# Speeding Lab

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Tiffany, Rob, Leana, Peter, Gabi

1. For our “Speeding Lab” we were supposed to evaluate how fast cars were going on Cooper Road in front of Irondequoit High School, and evaluate whether or not they were speeding. This project required us to use a stop watch and tape measure, measuring out 10 meters. One person timed the cars, while another recorded. We were given 10 minutes to make a plan, and then 10 minutes to find and record the data. Each group began at the same time, with the same car.

2. Step 1: Used 10 minutes to create a plan

Step 2: Measured out 10 meters on the sidewalk

Step 3: Waited for signal from teacher

Step 4: Timed 10 different cars within 10 minutes- Started timer once first tire reached beginning of tape, ended timer when first timer reached ending of tape

Step 5: Recorded data

Step 6: Found the velocity of each car by meters per second (v=d/t)

[TABLE="class: MsoNormalTable, width: 192"]

[TR]

[TD="width: 64, bgcolor: transparent"]3.

Car

[/TD]

[TD="width: 64, bgcolor: transparent"]Meters

[/TD]

[TD="width: 64, bgcolor: transparent"]Seconds

[/TD]

[TD="width: 64, bgcolor: transparent"]V=D/T

[/TD]

[/TR]

[TR]

[TD="width: 64, bgcolor: transparent"]green

[/TD]

[TD="width: 64, bgcolor: transparent"]

10

[TD="width: 64, bgcolor: transparent"]

1.46

[TD="width: 64, bgcolor: transparent"]

6.85

[/TR]

[TR]

[TD="width: 64, bgcolor: transparent"]silver

[/TD]

[TD="width: 64, bgcolor: transparent"]

10

[TD="width: 64, bgcolor: transparent"]

1.58

[TD="width: 64, bgcolor: transparent"]

6.33

[/TR]

[TR]

[TD="width: 64, bgcolor: transparent"]white van

[/TD]

[TD="width: 64, bgcolor: transparent"]

10

[TD="width: 64, bgcolor: transparent"]

1.32

[TD="width: 64, bgcolor: transparent"]

7.58

[/TR]

[TR]

[TD="width: 64, bgcolor: transparent"]red truck

[/TD]

[TD="width: 64, bgcolor: transparent"]

10

[TD="width: 64, bgcolor: transparent"]

1.54

[TD="width: 64, bgcolor: transparent"]

6.49

[/TR]

[TR]

[TD="width: 64, bgcolor: transparent"]big truck

[/TD]

[TD="width: 64, bgcolor: transparent"]

10

[TD="width: 64, bgcolor: transparent"]

1.64

[TD="width: 64, bgcolor: transparent"]

6.1

[/TR]

[TR]

[TD="width: 64, bgcolor: transparent"]gold

[/TD]

[TD="width: 64, bgcolor: transparent"]

10

[TD="width: 64, bgcolor: transparent"]

1.3

[TD="width: 64, bgcolor: transparent"]

7.69

[/TR]

[TR]

[TD="width: 64, bgcolor: transparent"]silver van

[/TD]

[TD="width: 64, bgcolor: transparent"]

10

[TD="width: 64, bgcolor: transparent"]

1.65

[TD="width: 64, bgcolor: transparent"]

6.06

[/TR]

[TR]

[TD="width: 64, bgcolor: transparent"]gold 2

[/TD]

[TD="width: 64, bgcolor: transparent"]

10

[TD="width: 64, bgcolor: transparent"]

1.37

[TD="width: 64, bgcolor: transparent"]

7.29

[/TR]

[TR]

[TD="width: 64, bgcolor: transparent"]SUV

[/TD]

[TD="width: 64, bgcolor: transparent"]

10

[TD="width: 64, bgcolor: transparent"]

1.38

[TD="width: 64, bgcolor: transparent"]

7.25

[/TR]

[TR]

[TD="width: 64, bgcolor: transparent"]buggy

[/TD]

[TD="width: 64, bgcolor: transparent"]

10

[TD="width: 64, bgcolor: transparent"]

1.3

[TD="width: 64, bgcolor: transparent"]

7.69

[/TR]

[/TABLE]

4. Average: 6.93 m/s

5.

6. Our results show that our cars were under the speed limit. The speed limit was 15.6 m/s. To improve our experiment, we could use a larger distance instead of 10 m, and try to use the stopwatches more carefully and accurately. Our results were under what our instructor obtained from his experiment. His average speed with the radar gun was 14.37 m/s.

Is there a speeding problem on Cooper Road? Well, according to our data, there is not a speeding problem. According to the instructor’s results, there does not seem to be a speeding problem either. Our average speed was 6.93 m/s and the instructor’s was 14.37 m/s. Some of his recorded data was above the speed limit, however, but all of our recorded data was under the speed limit. It may have ended up that way based on our error in measurement distance. In conclusion, there is not an overall speeding problem, but some cars go over the speed limit.

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The focus of this lab was to calculate the speed of cars on Cooper Road and determine how many are over the speed limit. In order to calculate the speed we were given a tape measure and a stop watch. Our group needed to find a method of calculating speed by using these materials.

Our group’s strategy for accomplishing this lab was to measure out a distance of 31.2 meters and mark the start and end points. A car travelling at 15.6 m/s is equal to 35mph and if the car is travelling at the speed limit it should take it 2 seconds to pass through 31.2 meters. In order to get the best reading possible we had one group member stand at the start point and signal another group member standing at the end point to start the timing. The group member standing at the end point would then wait until the car passes the end point and stop the timer.

Materials:

• Tape measure

• Stop watch

• Steps:

• Measure out 31.2 meters

• Mark a start and end point

• Practice timing

The results we obtained were not perfect. This is because we had too many variables causing human error. It took a long time for the group member standing at the starting point to signal the other group member at the end point, and then for the group member to start the timer. Also the position of the car when it crossed the start compared to when it crossed the end would most likely be different since the group member at the end has less than half a second to stop the timer (if the car is travelling at the speed limit). [ATTACH=CONFIG]176[/ATTACH][ATTACH=CONFIG]177[/ATTACH]

[*]Now to decide if there is a speeding problem on Cooper Road, no. Many of the cars recorded are under the speed limit. Our measurements can only roughly guess the speed of the car. But with our collected data, we can tell that many cars are not going very fast but slower than the speed limit.

[*]Group -- Collin, Alison, Mike, Lizzy

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Nice job everyone. Just for future assistance, if you want to attach a file, use the "insert picture" button, and the server will put a local copy of your graphic on the server so it can be seen by everyone.

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