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=**Chapter 1** = What factors affect the time you need to react to an emergency situation while driving?


 * Speed
 * Visibility
 * Weight of Vehicle
 * Drugs/Alcohol
 * Wet ground, Snowy ground
 * Brakes quality
 * Awareness
 * Going against gravity
 * Uphill -less time needed
 * oil slick= less friction need more reaction time
 * Decision making (which way to turn, do i have enough space to stop, what is on the ground)

=Section 1 = Grade: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Brake-to-Gas <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">.45/1 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4.5/10 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">.45 avg sec

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Individual x3 Stopwatch <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">.27, .28, .26 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2.6, 2.7, 2.8 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">.27 avg sec

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Meter Stick reaction time <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;"> <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Reaction w/ Decision * comparison- Reaction with decision is at least .15-.20 seconds slower than reaction without decision. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">28in/ .20secs <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">27in/ .13sec <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">29in/ .20sec <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">40in/ .23sec <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">21in/ .18secs <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">.188 avg sec

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Reaction w/ Decision and distraction(texting) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">22in/ .26sec <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">10in/ .18sec <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">14in/ .20sec <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">8in/ .12sec <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">20in/ .21sec <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">.194 avg sec

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Reaction time with decision questions: <span style="display: block; font-family: 'lucida sans unicode','lucida grande',sans-serif; font-size: 80%; text-align: left;">1.How does your reaction time with needing to make a decision compare with your reaction time without needing to make a decision? <span style="display: block; font-family: 'lucida sans unicode','lucida grande',sans-serif; font-size: 80%; text-align: left;">1A. The reaction time without making a decision is double when you need to make a decision. Rat. w/ Dec. = .188sec <span style="display: block; font-family: 'lucida sans unicode','lucida grande',sans-serif; font-size: 80%; text-align: left;">Rat. w/out decision =.093secs <span style="display: block; font-family: 'lucida sans unicode','lucida grande',sans-serif; font-size: 80%; text-align: left;">2. What does this difference in reaction time when making a decision apply to your ability to avoid road hazards? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2A. This increases the probability of crashing into an obstacle rather than being able to avoid road hazards.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Reaction time with decision and distraction questions: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1. How does your reaction time with needing to make a decision while distracted with texting compare with your reaction time without the distraction of texting? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">The reaction time while distracted and making a decision is greater than just having to make a decision and average response time. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Rat. w/ Decision and Dis. = .194 sec <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Rat. w/out decision = .093 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2. What does this difference in reaction time when distracted apply to your ability to avoid road hazards while texting? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">While driving and texting you become more distracted and therefore creating a greater chance of crashing. Also while having to make a decision increases it too.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Comparing methods of reaction time <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1) Record the class’ Fastest, Slowest and Average Reaction Time in your wiki. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;"> <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2) What factors may affect reaction time for people of the same age, like your classmates? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">It could be the age difference or there experience of driving. How well they can pay attention may affect there reaction time.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Physic talk questions #1-3 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1. How do distractions affect reaction time? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Distractions affect your reaction time by making it longer and more dangerous for the driver/passengers. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2. Why is driving under the influence of alcohol or drugs illegal? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">There are specific laws in states across the United States prohibiting the use of Drugs/alcohol while driving in a vehicle. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3.Name three factors in addition to distractions and drugs or alcohol that can affect reaction time. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Awareness, gender, and age are three factors that can affect reaction time.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Do Now: 9/8/11 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1. Half a second to reach the plate. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2. You still do not hit the ball sometimes when you react under .5 because it takes time for the bat to reach the top of the plate and hit the ball. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3. Swinging the bat at the ball. also it might takes some time for my body to send the message to click. you have to actually think of what to do and actually move your hands. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4. You can actually hit a 90mph fast ball but the application leaves out the swing of the bat, accuracy of the bat swing, and where the ball hits the bat. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">5. You can drive a manageable speed where you can control the car when you have to react. To anticipate the pitch would cause a reduced reaction time. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">6. They might yell "hey batter batter" to distract the batter and cause his reaction time to increase. Texting also increases you reaction time because your not paying attention to the road.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Notes: Active Physics Plus 9/9 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=1/2 a t^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">cm = 1/2 cm/s^2 s^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">D- distance any object falls in a time "t" (cm) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">A- acceleration caused by gravity (980 cm/s^2) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">T- Time any object falls a distance "d" (sec)

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Do Now 9/12/11 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">The driver of the race car does need a faster reaction time then a person driving in a school zone because the race car is going a lot faster than in a school zone. The driver has to react to other drivers which also have a shorter reaction to react. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Notes: A race car will cover more distance than a normal car on a main road.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Can you catch a dollar Bill?

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Max distance dollar bill can drop: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">15.5cm=d <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">reaction time to catch the bill: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=1/2 a t

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">15.55cm= 1/2 980 cm/s^2 x t^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">31.1cm= 980cm s^2 x t^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">.031 s^2= t^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">.031s=t

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Reaction Time Ruler Chart <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Reaction Time Parent Homework 9/12/11

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1.16.5 in .14 seconds <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2. 15 in__.21 seconds__ <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">__3. 13.5____.28 seconds__ <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">__4. 9.3 in____. 27 seconds__ <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">__5. 16 in____-.28 seconds

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Average Time:.236 seconds <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Average Distance:14.06 cms

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Physics to go 9/14/11 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">6. The slower reaction time might cause you to crash or cause serious injury. Rather than a faster reaction time which could stop a crash or injury. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">7. It is more expensive for teenage drivers because normally they are more distracted and might get into accidents more therefore they need the extra insurance money. Opposed to older drivers that have experience and know to ignore distractions.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">9/14 Reflecting on the Chapter Challenge <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1. What are the top two causes of accidents on the road? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">The first of the top two causes is rubbernecking, and the second is driver fatigue. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2. What is rubbernecking? Does rubbernecking constitute a decision or distractions? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Rubbernecking is look at a distraction on the side of the road. It is a distraction.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Distance on a falling object Graph <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;"> <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Quiz review: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">How we measured time to move foot to break <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">How we measured reaction time with stopwatch <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">catching dropping meterstick (reaction time) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">red/green (reaction time with decision) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">texting (reaction time with distraction)

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">What affects reaction time? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Decisions: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">which way to turn to avoid things <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">speed up or slow down <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">yellow light (speed up or slow down) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Distractions: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Rubbernecking <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Changing radio <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Cell phone <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Alcohol <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">passengers =<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Section 2 = <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Grade:

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Measurement: Errors, Accuracy, and Precision <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Calibrate
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">measure
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Identify
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">evaluate

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">What do you see what do you think?
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">measuring the distance
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Different lengths in footsteps
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">recording measurements might not be accurate

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Q1. include more of the question in your answer I think that one of them have made a mistake. If they are measuring the same object they should be relatively close but these are off. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Q2. I dont think that either of them have made a mistake.

<span style="background-color: #ffff00; color: #008000; font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Title Investigation

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Measuring using strides: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">22 steps pace-off <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">.42 meters one step

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">22 x .42 = 924 meters <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Total: 924 meters.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Actual: 12 meters and 28 cms

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Measuring Using Strides Questions:

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1. The measurements do not agree but they are similiar. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2. They vary by about 1-3 meters difference between each other. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3. They are different because not every person is going to have the exact same measurements. They look at the ground and the meter sticks differently. The strides might not be the exact same length and therefore changing the distance. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4. To make it more precise we could have one person making all of the measurements instead of a few different people.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Measuring Using a Meter stick Questions: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1. The measurements do not agree with each other but they are similar. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2. The measurements are about a difference of 1 meter. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3. They are all different because there is a different person measuring using the meter stick than another group which can cause the measurement to change a little. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4. Again you can use one person to measure for all of the groups and have one person take the one stride measurement. Have the same start and end point (toe to toe, or heel to heel). <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">5. I think that using the long tape measure will have a closer difference than using the meter stick. I don't think that everyone will have tyhe same exact answer. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">6. If you were to use one person with a long tape measure then everyone will have the same measurements and the calculations will be similar but not exactly the same. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">7. A. Yes everyone will have a systematic error but sometimes they will have the same answer. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">B. The error can cause a major problem causing the lab to be totally wrong and need a redo. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">8. a. You could mess up the meter stick measurement and continue measuring. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">b. You could have no taken a true step forward and not have the correct measurement. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">c. Different starting point that others, people may start a few cm's off than another group.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Calibrate <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Measure <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Identify <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Evaluate

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Physics Talk Questions <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1. A systematic error is when you make a mistake when writing down data or reading the measurement and can be corrected by calcualtions while, random errors are mistakes that cannot be corrected by calcualting. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2. Not everyone is going to have the exact same measurement. Each individual person will have a different perspective on the measurement and therefore a different number. Random errors appear. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3. The arrows would have to be all of the target not in a group to show a non-accurate and non precise shot.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Systematic error- an error produced by using the wrong tool or using the wrong tool incorrectly for measurement and can be corrected by calculations. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Accuracy- an indication of how close a series of measurements are to an accepted value. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Precision- an indication of the frequency with which a measurement produces the same result.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Do Now 9/19/11 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1. The thrower with the systematic error is the target that is precisie but not accurate. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2. The thrower with the random error is the target is accurate but not precise.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;"> <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Accurate but not precise <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;"> <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Precise but not accurate

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Demo- how long is the tube? 4 sided ruler

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;"> <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Notes: Physics Talk/Notes- SI System <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Quantity || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Unit || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Symbol ||
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Distance || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">meters || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">m ||
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Mass || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">grams || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">g ||
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Time || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">seconds || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">s ||
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Measuring a Copper Tube
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Groups || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Measurements ||
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">G1 || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">66 cm ||
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">G2 || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">64 cm ||
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">G3 || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">66 cm ||
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">G4 || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">64 cm ||
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">G5 || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">66 cm ||
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">G6 || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">64 cm ||

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Active Physics Plus: 9/20/11 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">.001<-- measured for time (third decimal place) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Faster: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2. S=D/T Speed= Distance/Time S= 50m/25s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">D=50 m <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">S=2 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">T=25 s
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1.Uncertaintiy
 * +/- 10 cm ---> +/- 10 (.01m) > +/- .1m
 * range = (50.1- 49.9)
 * +/- 1cm > 1(.01)m > +/- .01m= range (50.01- 49.99)
 * +/- 1mm > +/- 1(.001) m > +/- .001m range (50.001-49.999)

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">S= 2m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">T= ? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">D= .02m

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2= .02/t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">t 2= .02 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">t= .02/2

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">S=.01 seconds

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3. 301 laps <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">.02m x 30 laps= .6ms <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Range (1500.3-14.997)

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">s=d/t= 1500m/15(60s)= 1.66 m/s

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">T=D/S <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">T=.6/1.66m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">T= .36 seconds

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Physics To Go 9/21/11 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">#3 We are going to first estimate a pencil. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Steven- 6in <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Shawn- 8 in <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Then we measured a soccer ball's height <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Steven- 9in <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Shawn 9in <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">#4 Our estimate was probably not that accurate. The uncertainty could be drastically different because if your a 1,000 barrels off then thats $100,000 in the difference. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">#6 I think that example is A is reasonable while example B is not. In example A you can evenly distribute the soft drink, while your driving you are not always going a constant speed and maybe come to a stop which keeps using gas. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">#7 It is not as much off an error because if you measure the distance from your house to the school it may determine if you get the school bus or even go to the particular school. If your off by a meter measuring your room it isn't such a big deal. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">#8 A) You should drive at least 60mi/h just incase because if its range is within 5mi/h then you want to be a little slower so that you are not going too fast. If you tried to keep the speedometer on exactly 65 mi/h then you might be 5 mi/h over the speed limit. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">B) You could use a smaller measurement of speed to see how fast you are going to compare to the mile markers on the highway. You can use the formula D=S/T to see how fast you are going. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">#9 I disagree so the leeway should be at least five miles per hour over because if your just a half of a mile per hour over the speed limit you can get a ticket and it is a little ridiculous. It makes it almost impossible to go the speed limit.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">#1 Inquiring Further <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">-1 If you were going to be buying vegetables it should be by the weight of the total products that you are buying, while gasoline should be by the barrel. Also Carpeting should be by the foot.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Do Now 9/21/11 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">**What does it mean?** <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">This is a systematic error because he is using two different lengths of measurement and can convert them back to each other. This affects accuracy because it will change the number when it will be a smaller number when using a meter stick but larger when using a yard stick. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">**Why do you believe?** <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">You take certain step to make sure that you can trust the results of the experiment. You can take precautions of things that could go wrong and maybe even take out errors. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">**Reflecting on the Section and the Challenge?** <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">This is not valid because the radar gun will have to be off by a lot in order to be so uncertain. The radar gun will have to be virtually broken if it says 75 mph when the car is not actually going 75. Also the uncertainty will be between about 5 miles per hour.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">**Notes: 9/21/11** <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1) 49.99m (last decimal place is uncertain)-> +/- .01m uncertainty <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2) 50.5m-> +/- .1m uncertainty <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3) 51m (or even the last place is uncertain)---> +/- 1m uncertainty <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4) 50 (five is the uncertain number)--> +/- 10m uncertainty <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">As moving down this line they are becoming less precise. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1) Range (50.00-49.98) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2) (50.6-50.4) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3) (52-50m) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4) (60-40)

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">**Estimation investigation continued:** <span style="color: #231e20; font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a. True ---> Most football players are around 220lb so it is normal. <span style="color: #231e20; font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">b. False --->No the tallest people ever are around 7ft, 13 is double that <span style="color: #231e20; font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">c. False > teachers do not work 24hrs a day <span style="color: #231e20; font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d. False --> Poodles are not over 100lbs they would be ridiculous <span style="color: #231e20; font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">e. True --> No the room would have to be like 13x8x6 which is our classroom dimensions <span style="color: #231e20; font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">f. True ---> When you bring in sports fields and other it is at least 1/2mile and that is reasonable for most schools plus the schol builidng itself. It is a pretty long campus. <span style="color: #231e20; font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">g. True---> It is possible since you have a quarter of a mile to pass the tractor. <span style="color: #231e20; font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">h. Estimate how long it will take for the car to get over the bridge by estimating its speed and the distance. You also want to know your own speed. How wide your and his truck is and how wide the bridge is. <span style="color: #231e20; font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">i. You would make it with some distance to clear.

=<span style="color: #231e20; font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Section 3 = <span style="color: #231e20; font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Grade: 100 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;"> Average Speed following distance and models of motion: 9/23 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">What do you see/ what do you think: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">-car stopped short <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">-other cars running into the stopped car <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">-going very fast <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">-rear end collision <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">-What do you think is a safe driving distance <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">I think that a 3 car length is a safe driving distance from the car in front of you. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">-How do you decide what a safe following distance is? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">You can decide by judging if you will have enough space to stop your vehicle or by the speed of the driver in front of you. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">You need more time to stop while you are going faster.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">**Investigation: 9/23** <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">pg 34-36 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1a. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2a-b. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2c <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3a. The slowest is C while the fastest is A. The fastest car covers the most distance while the slowest coovers less. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3b. Yes because the distance between the cars is constant. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4a. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">walking towards the detector(above)

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4b. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">walking away from the detector (above)

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4.c <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">walking away from detector slowly.(above)

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4.d

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Walking towards the detector at a fast speed.(above)

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4.d con. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">walking away from detector at a fast speed (above)

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4.e The person who walked faster would have a stepper incline rather than someone walk at average speed which would take long to get to the same point. Walking away and towards the detector would have different slopes because of the distance change. Walking slower than average would make the graph longer.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">5a. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">predicted graph (above)

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">5.b test: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Compared to the graph above (Above)

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">6.a

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">6b. You can tell the difference because you can compare the two lines. The one with the steeper incline is the fast walking speed than the red line. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">7a. From our graph we have walked 3.3m in total. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">7b. 2.5/3.0= .589m and .9/3.0= .3m <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">7c. 3.3m / 5.6sec= .58928 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">7d. You would multiply the answer by two, therefore you would cover twice the distance, in twice the time. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">8a. 30 ft <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">8b. 90 ft <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">8c. 25 ft, then 75 ft <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">8d. 35ft, then 105ft <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">8e. 20ft <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">8f. 5 cars

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Physics talk 9/26/11: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1. The average speed of the vehicle is different than the instantaneous speed because instantaneous speed is the speed you are going at that particular moment, while the average is all the speeds that the car has gone in average. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2. Velocity is the rate and direction of an object while the speed is the rate of change in a particular distance. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3. The time it takes to move the distance is represented on the graph. It is inclining to the top right corner of the graph which means that it is going farther away while he takes time to do it. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4. The longer it takes the person to react the more distance that you will take up and this makes your reaction distance longer. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Created Checking Up Question: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">What does it mean when a graph shows a straight line moving the same distance of a long period of time?

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Speed- the distance traveled per nit time; speed is a scalar quanity, it has no direction. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Constant speed- speed that does not change over a period time. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">average speed- the total distnace traveled divided by the time it took to travel that distance.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Do Now 9/27/11 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1a. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=s/t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">s=90 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">t=.6 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">90x.6= 54 ft

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=s/t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">s=90 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">t=1.5 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">90x1.5=135 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">He will go an extra 81 ft when he is distracted longer.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;"> <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Active Physics Plus:9/28/11 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">p.47 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">V av = ∆D/∆T whole trip <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">V av = 80mi/∆T <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">20mph=40/∆T <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">∆t= 2hr <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Part || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Distance || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Time ||
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Part 1 (20 mph) || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">40 mi || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2 hr ||
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Part 2 (40 mph) || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">40 mi || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1 hr ||
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Whole Trip || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">80 mi || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3 hr ||

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">40 mph=40mi/∆T <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1hr=∆T

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Ex:
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Part || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Distance || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Time ||
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Part1 || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">50 mi || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">50 hrs ||
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Part2 || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">50 mi || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1 hr ||
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Total || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">100 mi || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">51 hrs ||

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;"> <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">∆T= 100/51 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">∆T=1.96mph <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">**This makes sense because a majority of the time was spent driving at 1mph, rather than 50 mph. Therefore, as an average, the slower time will pull down the average similar to how if you got 1 100% and 2 0% on tests, the average would not be fifty. by 33.3%** <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;"> <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2. Strobe sketch

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3a. I estimate that the average speed is 28.7 miles/hour <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3b. The actual average speed is 18.75 miles/hour

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Physics to Go: 10/2/11 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1a. In this strobe photo the vehicle was moving at the same constant speed for the total time. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1b. The vehicle started of at a slow speed and then moved up to a faster speed represented by the large space in between the diagram. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2a-2b. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">V=d/t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">350=d/20 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">350*20= t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">t= 7,000 feet

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4a. v=d/t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">v=215/4.5 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">s=47.77 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4b. You will not be able to determine the speed while traveling through Baltimore because we are only calculating the average speed so it ranges around 47.7 but not the exact speed. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">5. d=s/t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">5 miles=s/15min(or .25) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">s=5*.25 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">s=20 miles/hour <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">6a. This is showing at first the vehicle was moving fast and then came to a stop as time continued. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">6b. This one is showing that at first the vehicle was moving really fast and then came to a stop and then went backwards to the original starting distance. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">6c. The vehicle is moving ,at first, fast and then picks up the speed to be moving faster than originally. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">6d. This graph shows a constant increase of speed at a gradual rate. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">7a. 25=s/.45 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">25*.45=6.25 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">7b.16=s/.45 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">16*.45= 7.2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">s=6.25 comparing to 7.2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">7c. Your reaction time double would be 14.4. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">8a. They can calculate the time need to properly stop the vehicle a safe distance away from the vehicle in front of you. It is also making sure you have enough reaction time to even stop the car. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">8b. Three seconds on the highway will not be helpful because you are going a lot faster on the highway or interstate. You would need more reaction time and space to find the problem and stop the vehicle. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">9a. 100*(1/3)= 33.33 feet <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">9b. Yes 300 feet is a lot larger than my classroom. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">10a. 88*.5= 44 feet <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">10b. 44/15= 2.9 or 3 car lengths <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">10c. 44*.5= 22 ft and then 22/15= 1.46 or 2 car lengths <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">10d. 132*.5= 66 and then 66/15=4.4. 198 yards or 2 football fields in length. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">10e. 30 miles/hours will change from 1.46 to 2.92 or 3, 60 miles/hour will change from 2.93 to 5.86, 90 miles/hour will change from 4.4 to 8.8. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">11.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Do Now 10/3/11 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;"> <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Answer C. Because the dots represent that he started off slow and then he sped up and then stayed at a constant speed of a faster rate than the beginning

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;"> <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">D. because it starts of at a slow rate and then gradually gets faster and stays constant.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3. Distance vs. Time Graphs Cyclists: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a. They do not start at the same distance letter B starts at a farther distance away. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">b. Cyclist A is ahead becasue from 5 seconds on cyclist A is ahead. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">c. Cyclist A is traveling faster at 3 seconds because A has a steeper slope. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d. There velocities are never equal because there slopes are different at all times. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">e. At the intersection the cyclist are at the same distance away from the start at the same exact time.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a. They are exactly the same slope and thefore the same speed. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">b. The motions are different and because #4 is going backwards. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">c. Cyclist A has the greater speed becasue he has a steeper slope. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d. They are at the same distance at the same time but B is moving backwards while A is going forward. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">e. Cyclist A traveled more distance in the 5 seconds because cyclist A is steeper.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Graph1 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">In graph 1 we started at short distance and then rapidly moved to a farther distance away.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Graph2

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">In graph 2 we did the opposite of graph 1 and we started at a farther distance away and the moved rapidly to the detector

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Graph3

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">In graph 3 we started one run (gradually speed away from the detector) and a second run (gradually speed towards the detector). We had to do two runs because you can't go back in time and it is not a function.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Graph4 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;"> <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">We started at a farther distance away and then walked gradually towards the detector and then gradually away from it.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Graph 5 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">In this graph we did the opposite of graph 4, which is gradually walking away and then walking towards the detector.

=<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Section 4 = <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Graphing Motion: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Distance, Velocity, and Acceleration:

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif; font-size: 15px;">missing learning outcomes || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">What do you see, what do you think? 10/5/11 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">-Accleartion <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">-burnout not enough friction <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">-why are the front wheels of the ground? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">-Red car will reach top speed quicker than the yellow car. The red car has the greater acceleration. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">-Accelerating with a bus will take longer to reach 30miles/hour than a normal automobile. (car has greater acceleration)
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">** Section4 ** || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif; font-size: 20px;">**Points** ||
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif; font-size: 15px;">WDYSee/Think: || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif; font-size: 15px;">7/10
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif; font-size: 15px;">Investigate: || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif; font-size: 15px;">/20 ||
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif; font-size: 15px;">PhysicsTalk: || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif; font-size: 15px;">/20 ||
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif; font-size: 15px;">PhysicsPlus: || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif; font-size: 15px;">/20 ||
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif; font-size: 15px;">PhysicsToGo: || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif; font-size: 15px;">/20 ||
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif; font-size: 15px;">Wiki || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif; font-size: 15px;">/10 ||
 * <span style="display: block; font-family: 'lucida sans unicode','lucida grande',sans-serif; font-size: 15px; text-align: right;">**TOTAL POINTS** || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif; font-size: 15px;">**97** ||

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Tangent line:Notes <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Tangent line- A line that touches a curve at only one point. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Slope of tangent line on a distance versus time graph: the instantaneous velocity at any point in time.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Investigation:10/5/11

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Pre-lab questions: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1. If you were to place the cart at the top of the ramp and release it to freely move down the ramp would it move through the first half of the distance in the same amount of time as the second half of the distance? Why or why not?

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">No they would move at different speeds because it is gradually accelerating. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2. Top left graph: In this graph, the car travels faster at the beginning and slows toward the end. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Top right graph: In another, the car travels slower at the beginning and speeds up. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Bottom right graph: In one of them the cart does not move <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Bottom left graph: In another the car moves at constant velocity

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Run 1: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">The velocity increases as time goes on. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">.5 seconds tangent <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1.5 seconds tangent <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;"> <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Velocity Graph above

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Change in velocity/change in time <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">so 1.1/1.9 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">=.5789 m/s^2

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Run 3: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;"> <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Prediction (above)

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;"> <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">0.5 tangent line from start

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">.7 tangent line from start

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">velocity of run #2

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">change of velocity/change in time <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2.7/69 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">.0391m/s^2

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Run 4: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">prediction (below) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">0.5 seconds: (below) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1.5 seconds: (below) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Velocity Graph:

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">change of velocity/change of time <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">.17/3.0 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">.5666m/s^2

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Learning outcomes- <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Measure- a change in velocity of a cart on a ramp using a motion detector. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Construct-graphs of motion of a cart on a ramp. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Define- acceleration using words and an equation. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Calculate- speed, distance, and time using the equation for acceleration. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Interpret- distance-time and velocity-time graphs for different types of motion.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1. The equation of acceleration. ( A = ∆v/∆t ) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2. The SI unit for measuring acceleration = m/s^2. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3. A vector is a quantity that has both magnitude and direction. Scalar is a quantity that has only magnitude, but //not// direction. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4. Graphs: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;"> <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">5. Slope of the velocity-time graphs represent velocity.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Do Now: 10/7/11 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1) The acceleration of the car is 6m/s^2 because 30/5=6 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2) Scalar- speed (mph or m/s) and pressure (lbs. per square inch in a certain direction) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vector- Velocity (m) and weight (lbs.) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Speeding up Graph: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Slowing down graph: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">prediciting v vs t graph

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Active Physics Plus: 10/12/11

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1) a= 3 m/s^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vi= 7 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf= 20 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">∆t=?

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= ∆v/∆t

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3 m/s= (20 m/s-7 m/s)/ ∆t

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3m/s∆t= (20m/s-7m/s) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">∆t= (20 m/s-7 m/s)/ 3 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">∆t= 4.333 seconds

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2) a=1.5 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vi= 7 m/s^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf=? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">∆t= 10 seconds

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= ∆v/∆t

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1.5 m/s= (Vf-7 m/s^2)/ 10

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">15 m/s= (Vf-7 m/s^2)

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">22 m/s = Vf

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3)Part A <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= ∆v/∆t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a=? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vi=0 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf=20 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">∆t=(5-0)

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= (20-0)/(5-0)

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= 4 m/s

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Part B <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a=4 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vi=0 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf= 20 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">∆t= 5 sec

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= (1/2) x 4 x 5^2

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= 50 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4)a= ∆v/∆t

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a=4 m/s^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">∆v= (40 m/s- 0 m/s) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">∆t= 10-0

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= (1/2)x4x10^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= 200 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">5) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">A. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a=∆v/∆t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= (23-3)/(5-0) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a=4 m/s^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">B. d=(1/2) x a x t^2 + Vi x t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= 65 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">6) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">A. a=(0-25)/(4-0) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= -6.25 m/s^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">B. It is negative because the vehicle is slowing down to the stop light. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">C. d= (1/2) x a x t^2 +Vi x t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= 50 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">8) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a=-7m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">t=3sec <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vi=21m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf=0 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=(1/2) x -7 x 3^2 + 21 x 3 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=31.5 meters <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">40-31.5 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">8.5 meters away therefore it wont hit the deer.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">9) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= -7 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">t=? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vi=0 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf= 42 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">t= 6 seconds

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=(1/2) x -7 x 6^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= 126 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">So therefore it will not have hit the deer.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Physics to Go: 10/13/11 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1) This can not happened because in order for acceleration to happen you need speed or velocity to go along with it. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2) This is not possible because in order for there to be acceleration there needs to be a force of speed/ velocity behind it. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3) They may not have the same velocity because one car might be heavier than the other, and it depends in what direction becasue one car might be going up a hill be enacted upon by gravity more. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4) They might not have the same acceleration becasue one car can take longer time getting up to the speed rather than quickly. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">5) Yes it can be overtaken because it takes a few seconds for the vehicle to get up to that certain speed and the car moving at the constant velocity already will take no time since they are already at the speed. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">6) They are different than each other, so it would be wrong to refer to them as the same thing. The speed limit is miles per hour while velocity is purely on the speed. the speed limit signs in the United States are in Miles/ Hour.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">8)A. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a=∆v/∆t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= (75m/s-0m/s)/ (9s-0s) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= 8.33 seconds <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">B. 37.5 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">C. d= (1/2)x a x t^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= (1/2) x 8.33 x9^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= 337.365 meters <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">D. a= 9.375 seconds <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">speed= 37.5 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= 300 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">9)A. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= ∆v/∆t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= (4.5-.6)/(0-1.3) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= -3 seconds <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">B. d of slide= 5.85 meters <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">C. 1.2 seconds <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">D. if she slide for 1.1 seconds she would arrive slightly quicker.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">10) A. 11 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">B. a=∆v/∆t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a=(11 m/s- 0m/s)/ (9.0-0) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= 1.22 seconds <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">C. The objects velcoity would be a lot higher and greater since it has more space and time to speed up before hitting the ground.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">11) A. Graph F would represent it the best. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">B. Graph D. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">C. Graph B. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">D. Graph A. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">E. Graph F <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">F. Graph C.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">12) A. c <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">B. b <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">C. d <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">D. e <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">E. A little bit over 1,000 meters. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">F. Back at the start of the track since it has no distance and no time.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">13)A. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= ∆v/∆t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= (250-0)/(30-0) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a=8.33 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">B. 374.95 m/s ? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">C. It would take 60 seconds or 1 minute for it to reach 500 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">D. d= (1/2) x a x t^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= 91/20 x 8.33 x 60^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= 14994 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">14)?????? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">A. 980 meters/seconds <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">B. ?

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">15) A. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a=∆v/∆t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= (282.52928-0)/(0-1.4) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= -201.806 m/s^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">B. -20.59 g's <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">C. d=(1/2) x a x t^2+ Vi x t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= (1/2) x -201.806 x 1.4^2 + 282.52928 x 1.4 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= 197.77 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">16) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">A. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=(1/2) x a x t^2+ Vi x t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= (1/2) x 4.0 x 1^2+ 4.0 x 1 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= 6 meters <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">B. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">(1/2) x 4.0 x 2^2+ 4.0 x 2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= 16 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">C. d= 30 meters <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">D. 48 meters <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">E. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">F. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">G. They are relatively similar to each other. It takes a while for the vehicles to get up to speed but and the distance increases as the speed increases. Velocity is constant since the distance is gradually increasing.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Quiz review: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Instantaneous velocity- finding slope of tangent <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a=∆v/∆t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=(1/2)at^2=Vit <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">finding velocity from distance vs. time graph (by slope)

=<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Section 5 = <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">reaction distance and braking distance sections of total stopping distance activity are missing || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">**What do you see? What do you think?** 10/18/11
 * <span style="font-family: 'Courier New',Courier,monospace;">** Section5 ** || <span style="font-family: 'Courier New',Courier,monospace; font-size: 20px;">**Points** ||
 * <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">WDYSee/Think: || <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">/10 ||
 * <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">Investigate: || <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">/20 ||
 * <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">PhysicsTalk: || <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">/20 ||
 * <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">PhysicsPlus: || <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">/20 ||
 * <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">PhysicsToGo: || <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">15/20
 * <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">Wiki || <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">/10 ||
 * <span style="display: block; font-family: 'courier new',courier,monospace; font-size: 15px; text-align: right;">**TOTAL POINTS** || <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">**95** ||

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">-Car screeching to a stop <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">-negative acceleration trying to stop <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">-a moose <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">-going from fast speed to slow speed <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">-back tires are off the ground <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">-moose is un-happy <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">-friction to stop the vehicle

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">What factors must you consider to determine if you will be able to stop in the distance between you and the animal to avoid hitting it? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">-weather codnitions <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">-reaction time <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">-drugs/alcohol

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">**Investigation:10/18/11** <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;"> <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;"> <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">**Learning outcomes:** <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Plan- Carry out an experiment to relate breaking distance to initial speed. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Determine- braking distance <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Examine- accelerated motion

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Checking up questions: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1. It is undergoing a negative acceleration because it is acting upon the vehicle in the opposite direction. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2. The braking distance increases because the faster the vehicle is moving the more space that it needs to slow down. It has so much momentum that it need more space than it would at a slower speed. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3. It is called negative acceleration because it is still moving in a positive direction.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Physics words: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Negative acceleration- a change in the velocity with respect to time of an object by decreasing speed in the positive direction or increasing speed in a negative direction.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Honda Civic Stopping Distances: 10/20/11 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4) If Initial Velocity is doubled how does stopping distance change? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">The initial velocity is doubled then the stopping is 4x the velocity. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">5) If the Initial Velocity is multiplied 4 times how does the stopping distance change? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">The stopping distance is 16x the initial velocity. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">6) If the Initial Velocity is halved how does the Stopping Distance Change? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">The stopping distance would become ¼. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">7) If the initial Velocity is quartered how does the stopping distance change? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">The stopping distance become 1/16 when squared <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">8) What speed would you need to have a stopping distance of a mile? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">(60/x)^2= 123/5280 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3600/x^2=123/5280 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">x=393.11 mph <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;"> <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Physics to Go: 10/24/11 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2.Automobile a is a safer vehicle because it is able to stop quicker than automobile b. This means when they need to react they can stop faster. I can determined what safer meant because when you compare them there is a big difference and possible dangerous.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3. a- 5 meters <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">b- 80 meters <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">c- 45 meters <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d- 125 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4. TSD (Total Stopping Distance)= Treaction + 30m <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">TSD= (.9)(10)+ 30 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">TSD= 39 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">5. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">6. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">7. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">8. If you can recognize the problem in order to react to it quicker than you will be safer and be able to stop the vehicle before you hit something. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">**Total Stopping DIstance 10/26/11** <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">TSD= d(reaction)+d(braking)

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d(reaction)| V=d(reaction)/t(reaction) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">V(Treaction)= d(reaction)

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">TSD= VTr + (Vi^2/2a) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">~ direct proportion <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">\ inversely proportional
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">if Vi Increases || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">then TSD change^ || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vi~TSD ||
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">If Tr ^ || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">then TSD change^ || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Tr ~ TSD ||
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">If a^ || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">then TSD v || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">TSD\(1/a) ||

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Active Physics Plus: 10/24/11 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Equations of motion <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=(1/2) (Vi+Vf)t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf= Vi+at <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=ViT+(1/2)at^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf^2= Vi^2+2ad

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Average Acceleration <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf= 0m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vi= 9m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= -4.1m/s^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">t=? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">0m/s=9m/s +(-4.1/s^2)t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">t= 2.1 seconds

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2. a= 2.5 m/s^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf= 12m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vi= 7 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">t=? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">12=7+(2.5)t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">5=2.5 t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2seconds =t

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3. a= -.50 m/s^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf= 0m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vi= 13.5 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">t=? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">0= 13.5+ (-.50)t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">-13,5=-.50t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">27 seconds =t

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4. Vf=-6.5 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vi= -1.2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= ? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">t=1500 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">-6.5= -1.2+ (a) 1500 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= -.0035 m/s^2

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">5. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">∆V= at <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">∆V= (4.7 x10^-3) 300 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">∆V= 1.41 m/s

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf=(1.7)+ (4.7x10^-3)300 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf= 3.11 m/s

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Displacement with constant uniform acceleration: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vi=0m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf= 23.7km/h <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">t= 6.5s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=?

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= (1/2)(0+6.58) 6.5 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=21.385 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2.Vf= 0m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vi= 15 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">t= 2.5s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=(1/2) (15-0)2.5 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=18.75 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3. d=? km <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf= 0m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vi=100m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a=-5.0m/s^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">0= 100^2+ 2 (-5.0)d <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">10d=100^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=1000

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4. Vi= 21.66 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf= 0m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=99 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">t=? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">99= 1/2(21.66+0)t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">t= 9.14 seconds to stop

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">5. d=3.2 km <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf=? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vi=6.4m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">t=3.5 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3200=(1/2)( 6.4+Vf) 3.5 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3200=(3.2+.5Vf)210 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3200=672+105Vf <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf=24.07 m/s

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Velocity and Displacement: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1.Vi= 23.7 km/h or 6.58 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= .92 m/s^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">t=3.6 s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf=? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf= 6.58+ (.92)(3.6) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">9.892 m/s= Vf

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= (1/2) (Vi+Vf) t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= (1/2) (6.58+9.89) 3.6 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=29.7 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2. Vi= 4.30 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf=? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= 3.0 m/s^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">t= 5 s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf= 4.30+ (3)(5) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf= 19.3 m/s

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=(1/2) (4.30+19.3) 5 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= 59 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3. t= 5 seconds <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= -1.5 m/s^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf=? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vi= 0m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf= 0 + (-1.5)(5) <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf= -7.5 m/s

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=(1/2) (0+-7.5) 5 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= -18.75 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4. Vi=15 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf= 10 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= -2.0 m/s^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">t=? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">10=15+ (-2.0)t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">t=2.5 seconds

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=(1/2) (15+10) 2.5 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= 31.25 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Final Velocity after any displacement <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2. Vi=7 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a=.8 m/s^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=245 m <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf=?

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a. Vf^2= 7^2 +2(.8)245 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf= 21 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">b. Vf^2= 7^2 + 2(.8)125 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf= 15.77 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">c. Vf^2= 7^2 + 2(.8) 67 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf= 12.49 m/s

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf=? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vi=0 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= 2.3 m/s^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= 55

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf^2= 0^2+ 2(2.3)55 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf= 15.9 m/s

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">b.55=(1/2)(0+15.9) t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">t=47.05 seconds

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4.a. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= .85 m/s^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf=26.1 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vi=23.1 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">26.1^2= 23.1^2+ 2(.85)d <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= 86.82 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">5. Vf= 33.33 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vi= 0 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a=? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= 240 m <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">33.3^2= 0^2+ 2(a)240 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a=2.3 m/s^2

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">6. Vf=1.5 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vi= 6.5 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= -2.7 m/s^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d=? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1.5^2= 6.5^2+ 2(-2.7)d <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= 7.40 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Preparing for the Chapter Challenge: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Treaction= .5 seocnds <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vi= 11m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= -4 m/s^2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Dreaction=5.5 meters <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Dbraking= <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">TSD=15.125+5.5= 20.625 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">v=Dr/Tr <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">11=Dr/.5 seconds <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Dr=5.5 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf^2=Vi^2 +2aDb <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">0^2=11^2 +2(-4)Db <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Db=15.125 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2. Treaction= .5 seconds <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vi= 27 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= -4 m/s

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">v=Dr/Tr <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">27=Dr/.5 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">V= 13.5

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf^2= Vi^2 +2ad <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">0^2= 27^2 +2(-4)d <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Dbraking= 91.125 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">TSD= 104.625 emters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3. Treaction= 1 seconds <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vi= 27 m/s <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= -4m/s

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">V=d/t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">27= Dr/ 1 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Dr= 27

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf^2=Vi^2 +2ad <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">0^2= 27^2 +2(-4)d <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Db=91.125

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">TSD= 118.125 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">4. Treaction= .5 seconds <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">a= -2 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vi= 27 m/s

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">V=d/t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">27= D/.5 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Dr= 13.5 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf^2=Vi^2+2ad <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">0^2= 27^2 +2(-2)d <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">db= 182.25 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">TSD= 195.75 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Summative Questions: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1. The factors that affect Reaction distance are Velocity and the reaction time. If the velocity changes really high and a slow reaction time you will end up with a larger reaction distance. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2. The factors that affect the braking distance is the velocity and the acceleration of the vehicle.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Created Problem: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1. While driving on the highway with a velocity of 300 m/s, you notice a large crash up ahead on the road. Your reaction time is .7 seconds with a deceleration of -6 m/s^2. What is the Distance(reaction), Distance(braking), and Total Stopping Distance.

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">v=d/t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">300=d/.7 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Dreaction= 210 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf^2= Vi^2 +2ad <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">0^2= 300^2 +2(-6)d <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">d= 7500 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">TSD= 7710 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Sovled Problem: <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1) Assume that you are traveling on a main road going 17 m/s. Your maximum acceleration is -0.021 m/s. Your reaction distance is 1.7 seconds. Find Dr, Db, and TSD

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">v=d/t <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">17=Dr/1.7 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Dr=28.9

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Vf^2= Vi^2 +2ad <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">0^2= 17^2 +2(-.021)d <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Db= 6880.95 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">TSD= 6909.85 meters

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">__**Mini Challenge Plan**__ <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">1) paragraph explaining theme/ storyline <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">2) 3 ways you will use eqautions <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">3) 3 ways you will use graphs
 * <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">Email to Kibala by the end of the period.

<span style="background-color: transparent; color: #000000; display: block; font-family: 'lucida sans unicode','lucida grande',sans-serif; font-size: 11pt; text-decoration: none; vertical-align: baseline;">Story line - A Zamboni is on the ice when it shouldn't be because the guy was trying to leave work early. There was a skater still on the ice and the Zamboni driver had to slow down before it hits him.

<span style="background-color: transparent; color: #000000; display: block; font-family: 'lucida sans unicode','lucida grande',sans-serif; font-size: 11pt; text-decoration: none; vertical-align: baseline;">3 ways you will use equations- Will he hit the person. (distance equation) The zamboni is racing a skater. (acceleration equation) How long will the Zamboni take to get across the entire rink (velocity?)

<span style="background-color: transparent; color: #000000; display: block; font-family: 'lucida sans unicode','lucida grande',sans-serif; font-size: 11pt; text-decoration: none; vertical-align: baseline;">3 ways you will use graphs- Graph to compare skater and Zamboni speeds/accelerations. Graph to show how long it takes to go a distance. Graph to show how ice effects slowing down

<span style="background-color: transparent; color: #000000; display: block; font-family: 'lucida sans unicode','lucida grande',sans-serif; font-size: 11pt; text-decoration: none; vertical-align: baseline;"> =<span style="background-color: transparent; font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif; font-size: medium;">Section 6 =

<span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">+16 EC || <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">did not double speed for go zone and stop zone of a real intersection || <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">bold titles to activities || <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">What do you see, what do you think? 11/3/11 <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">- One car is speeding up trying to beat the yellow light <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">- Another car is try to stop on the line so that it doesn't blow the red light. <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">- Red car is braking and up in the air <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">- Red car might have reacted late <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">- Red car might be speeding <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">- Affected braking distance
 * <span style="font-family: 'Courier New',Courier,monospace;">** Section6 ** || <span style="font-family: 'Courier New',Courier,monospace; font-size: 20px;">**Points** ||
 * <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">WDYSee/Think: || <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">/10 ||
 * <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">Investigate: || <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">/20
 * <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">PhysicsTalk: || <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">/20 ||
 * <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">PhysicsPlus: || <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">/20 ||
 * <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">PhysicsToGo: || <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">10/20
 * <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">Wiki || <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">8/10
 * <span style="display: block; font-family: 'Courier New',Courier,monospace; font-size: 15px; text-align: right;">**TOTAL POINTS** || <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">**104*.75 = 78/75** ||

<span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">What is wrong with the intersection? <span style="font-family: 'Lucida Sans Unicode','Lucida Grande',sans-serif;">- Red car was speeding and might not have programed the yellow light to be very short. While the green car is speeding up to get through the red light.





Learning outcomes: 11/3/11 Investigate- the factors that affect the STOP and GO zones at intersections with traffic lights. Investigate- the factors that result in a Overlap zone or a Dilemma zone at intersections with traffic lights. Use a computer simulation to mathematically model the situations that occur at intersections with traffic lights.

Investigation:

B. Automobile B is in the Go zone since the car will be able to go through the light. C. Yes any other vehicle that would be in front of vehicle A will be able to go through. D. Automobile C is not in the Go zone and if he continues and doesn't stop he will go through a red light.
 * 1) 3)A.Car B will be able to drive through the yellow light.

B. Automobile F is not in the stop zone and if he stops he will be in the middle of the intersection.
 * 1) 4) A. Automobile E is in the Stop zone because if he continues he will go through a red light.

Vi(speed limit) || Go Zone ||
 * Input || Output ||
 * Speed
 * Ty yellow light time || Stop Zone ||
 * w (width of the intersection) ||  ||
 * a (negative acceleration) ||  ||
 * Tr (reaction time) ||  ||







Investigation: 11/8/11 Yellow light Delimma 1. Automobile A- Stop Automobile B- Go Automobile C- Go Automobile D- Stop 2. Automobile E- Stop Automobile F- Stop Automobile G- Go Automobile H- will be able to do both. (overlap zone) 3. Automobile K- Go Automobile L-Stop Automobile M- Go(dilemma zone) Automobile J-Stop 4. A. The intersections are different because the stop and go zones are different in each. B. I would not continues through the intersection since the choices are going and stopping at the intersection C. I would not continues through the intersection since the choices are going and stopping at the intersection. The safest way to go is to stop at the intersection. D. The overlap zone is Intersection II, while the dilemma zone is Intersection III.

Go zone/stop zone deriving equations 11/8/11: Go zone: v=d/t v=d/Ty v=(w+GZ)/Ty calculating for GZ vTy= (w+GZ) vTy-w= GZ or GZ= vTy-w ^ go zone ends at Gz

Stop zone: SZ=Dr+Db SZ= ViTr+(Vi)^2/2a Stop zone begins at SZ

Physics to go 11/8/11: 1. The spreadsheet is referred to as a model. With Input and Output on one side and the factors on the other side. 2. The Go Zone is the area before a intersection that allows the driver during a yellow light to proceed through the intersection. 3. The Stop Zone is the area where you must stop your vehicle during a yellow light since you will not make it past the intersection from the distance you are away. 4. The Overlap zone is a special place where you can either go through the intersection or stop before entering the intersection. 5. The Dilemma zone is the area where the driver has to make a decision quickly to either stop or go and this puts the driver under pressure.

Active Physics Plus sec.6 1) w=25m Ty= 3sec Vi= 20 m/s a= -5 m/s^2 Tr= .7 sec

GZ= (20)3- 25 GZ=60-25 GZ=35 meters SZ=ViTy- Vi^2/2a SZ= (20).7- 20^2/2(-5) SZ= 14- 20^2/2(-5) SZ=14+40 SZ=54 meters

2) w=23m Ty=5sec Vi=25 a=-6 Tr=.5

GZ= (25)5 - 23 GZ= 125-23 Gz= 102 SZ=(25).5 - 25^2/2(-6) SZ= 64.58meters

w=15m Ty=4sec Vi=25 m/s a=-4 Tr=.5

GZ= (25)4-15 GZ= 85 meters SZ=(25).5- 25^2/2(-4) SZ= 57.14

w=30m Ty=10sec Vi=21 a=-2 Tr=.8

GZ=(21)10-30 GZ=180 meters SZ=(21).8-21^2/2(-2) SZ=127.05

3) 4)

HW 11/14/11 1) Yes the Go zone will change because the width of the intersection has increased therfore the go zone will shrink. 2) The engineer should change the yellow light time to give the driver more time to cross the intersection. The driver should be going a faster Inital Velocity so that he can move quickly through the intersection. 3) A. The driver with the bad brakes will have to stop first because he/she has a bad negative acceleration. B. The driver with the bad brakes will have the larger stopping distance. C. The driver with the good brakes will be ushed back farther since he can stop quicker. 4) The vehicle going faster will have a larger stopping distance. While the car going slower will have a smaller stop zone. 5) The driver that is drunk will have a larger stopping distance because he can't react as he normally would. While the normal driver will have a normal stopping zone. 6) If you are moving faster and you need to stop the speed of the vehicle will affect the stopping distance and change your decision. Also if your going faster you will need a more negative acceleration. While in the Go zone you don't have to worry about a negative acceleration since your not braking.

Go Zone and Stop zone of a real intersection Project: 11/15/11

5) This makes it more dangerous to pass through the intersection. There is a larger ticket because your not going the speed limit. The Go zone is increased because your moving faster and covering more distance quicker therefore making the Go zone larger.

=Section 7= <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">missing centripetal force notes ||
 * <span style="font-family: 'Courier New',Courier,monospace;">** Section7 ** || <span style="font-family: 'Courier New',Courier,monospace; font-size: 20px;">**Points** ||
 * <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">WDYSee/Think: || <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">/10 ||
 * <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">Investigate: || <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">/20 ||
 * <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">PhysicsTalk: || <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">10/20
 * <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">PhysicsPlus: || <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">/20 ||
 * <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">PhysicsToGo: || <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">/20 ||
 * <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">Wiki || <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">/10 ||
 * <span style="display: block; font-family: 'Courier New',Courier,monospace; font-size: 15px; text-align: right;">**TOTAL POINTS** || <span style="font-family: 'Courier New',Courier,monospace; font-size: 15px;">**67.5/75** ||

- Car is going very fast - skidding a little of the cliff - all over the road - will be difficult to stop The sign is indicating to slow down because the road is very curved and difficult to driver when going a fast speed. The speed is determined by the fast speed you can safely make the turn.
 * What do you see what do you think 11/15/11**:

Centripetal force- a force directed towards the center to keep an object in a circular motion. Centripetal acceleration- a change in direction of velocity with respect to time.
 * Physics words 11/15/11:**

1. The direction of the force is towards the center of the circle. 2. Centripetal force. 3. The force keeping the vehicle turning in a circle is the friction of the tires. 4. This happens because it is accelerating in a different direction every time there is a different direction. 5. When a car turns left onto another road. Another example would be when your sliding on ice your accelerating while you have no grip to the floor. the third example is when how the earth revolves around the moon. 6. The earth rotates around the sun because of its gravitational pull.
 * Checking up questions: 11/15/11**

Distance 1: 7cm===== Time= 12 seconds Distance 2: 13cm=====Time=15 seconds
 * Investigation 11/16/11:**
 * 1)

Distance 1= 12/10=1.2 seconds Distance 2= 15/10=1.5seconds

C=2(3.14)7 C= 43.96/1.2 36.6 cm/s

C=2(3.14)13 C= 81.64/1.5 54.4 cm/s You will achieve a larger speed when you are taking a wider turn because the data shows that the large radius the faster your speed will be.

Distance (sand paper)- 14cm Distance (wood)- 15 cm
 * 2)

Distance (sand paper)= 13 seconds Distance (wood)= 15 seconds (sand paper)14/13=1.1 seconds (wood)15/15=1 seconds

C=2(3.14)14= 87.92cm C=2(3.14)15=94.2cm

87.92cm/1.1=79.9cm/s 94.2cm/1=94.2cm/s You can achieve a faster speed on sand paper rather than wood because the weight is gripping the road shown by the data resulting in 94.2cm/s

Distance 1=4cm Distance 2=11cm
 * 3)

Distance 1= 10.26sec Distance 2=15.56sec

4/10.26=.389seconds 11/15.56= .706secs

C=2(3.14)4=25.12 cm/s C=2(3.14)11= 69.08cm/s You can achieve a larger maximum speed when skidding out at a farther a distance. Because the data shows that the farther distance away has a larger speed.

Centripetal acceleration- change in the direction of an objects velocity but not a change in its speed. As an object moves around a turn or a circle the acceleration is towards the center of the circle. Centripetal acceleration and centripetal force are un-directional.
 * Notes: 11/16/11**

1.v=C/t V=2(3.14)6400/24 V=40192/24 V=1674.666km/h and 465.185 2.C=2(3.14)1.5x10^8 C=942000000 942000000/8766= V=107515.149km/h 3.C=2(3.14)15 C=94.2 94.2/60 1.57 4. A. If the curve becomes tighter then the speed will become greater. B. If the road surface becomes more slippery then the speed will decrease. C. Then it would remain relatively the same but not exactly. 5. When a basketball rolls on the rim the force of gravity forces it to go towards the center of the basket and score the point. 7. This means that the driver is just change the direction that the vehicle is going but the road is the force behind the movement because of friction. 8. C=2(3.14)1000 C=6280 6280/270 23.25 9. The first scenario is correct while the seconds is incorrect. This is because the seconds person should have moved in any direction instead of staying in the same spot while the car made a sharp turn. 10. The car will have a tough time continuing around the turn because its going so fast, ending in a skid. The vehicle wants to move in the same direction. 11.These are very dangerous because it causes the dirver to slow down as he/she is making the turn and possibly resulting in a a crash of a skid because they have to change speeds drastically. 12. If the lane is curving to the right you will end up in the other lane because the car wants to contiune straight opposed to if you were curving left.
 * Physics to Go 11/16/11:**


 * Active Physics Plus 11/17/11:**
 * 1) 1-4 Fc=mv^2/r

Fc= newtons or N (newton are a measure of force like pounds)

N=(kg)(m/s)^2/meters N=(kg)(m^2/s^2)/meters Newton= (kg)(m)/(s^2)

13720=(2000)V^2/10 V^2= 68.6 V=8.3 meters
 * 1) 1) Fc=mV^2/r

r=10m Fc=6860 m=200 6800=200v^2/10 V^2=340 V=5.9m/s
 * 1) 2) Fc=mV^2/r

Fc=20580 v=10 m=3000 20580=(3000)10^2/r r=14.6
 * 1) 3) Fc=mv^2/r

v=5m/s m=2200 Fc=6000 6000=(2200)5^2/r r=9.16meters
 * 1) 4)Fc=mv^2/r

Ac=v^2/r
 * 5-7

v=10 Ac=? Ac=10^2/12 Ac=8.3m/s^2
 * 1) 5)r=12


 * 1) 6) It is four times greater than the original speed.

r=24 v=10 Ac=10^2/24 Ac=4.16 m/s^2
 * 1) 7) Ac=V^2/r