Todayour purpose was to find how fast the cars on Cooper Road, outside of our school,were going. The group took a role as anIrondequoit Police Officer to evaluate if any cars were exceeding the speedlimit. We had to use our knowledge of physics to help us calculate how the timeit took a car to travel a set distance related to the velocity, and how wetransfer that to relate to miles per hour. Here is our procedure:
First, we decided how we wanted to set a distance,some groups used long strings of measuring tape to set a distance. We, howevermeasured a sidewalk block and chose to use 20 of them. We found each block was 1.51meters long, so our distance was 30.2 meters in total. Then, we split up thethree members of our group, gave two stop watches and put each on either sideof the testing zone, and one stood in the middle, and charted the descriptiveelements of each car. To find the time, we started each stop watch when the carreached the point of the first person and stopped the timer when it left thesecond person. We made a table to write down the times, and we measured thetimes of 10 cars. Following the test we calculated the average speed of the 10trials and calculated the average speed of each car to meters per second, andrelated that to the speed limit (35mph/ 15.6 m/s). We were able to find that noneof the cars were speeding.
This is our chart:
[TABLE="width: 379"]
[TR]
[TD]Car#[/TD]
[TD]Distance (m)[/TD]
[TD]Time (s)[/TD]
[TD]Speed (m/s)[/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD="align: right"]30.2[/TD]
[TD="align: right"]2.95[/TD]
[TD="align: right"]10.24[/TD]
[/TR]
[TR]
[TD="align: right"]2[/TD]
[TD="align: right"]30.2[/TD]
[TD="align: right"]2.46[/TD]
[TD="align: right"]12.28[/TD]
[/TR]
[TR]
[TD="align: right"]3[/TD]
[TD="align: right"]30.2[/TD]
[TD="align: right"]2.77[/TD]
[TD="align: right"]10.90[/TD]
[/TR]
[TR]
[TD="align: right"]4[/TD]
[TD="align: right"]30.2[/TD]
[TD="align: right"]2.81[/TD]
[TD="align: right"]10.75[/TD]
[/TR]
[TR]
[TD="align: right"]5[/TD]
[TD="align: right"]30.2[/TD]
[TD="align: right"]2.41[/TD]
[TD="align: right"]12.53[/TD]
[/TR]
[TR]
[TD="align: right"]6[/TD]
[TD="align: right"]30.2[/TD]
[TD="align: right"]3.48[/TD]
[TD="align: right"]8.68[/TD]
[/TR]
[TR]
[TD="align: right"]7[/TD]
[TD="align: right"]30.2[/TD]
[TD="align: right"]2.94[/TD]
[TD="align: right"]10.27[/TD]
[/TR]
[TR]
[TD="align: right"]8[/TD]
[TD="align: right"]30.2[/TD]
[TD="align: right"]3.33[/TD]
[TD="align: right"]9.07[/TD]
[/TR]
[TR]
[TD="align: right"]9[/TD]
[TD="align: right"]30.2[/TD]
[TD="align: right"]2.29[/TD]
[TD="align: right"]13.19[/TD]
[/TR]
[TR]
[TD="align: right"]10[/TD]
[TD="align: right"]30.2[/TD]
[TD="align: right"]2.45[/TD]
[TD="align: right"]12.33[/TD]
[/TR]
[TR]
[TD][/TD]
[TD]Average[/TD]
[TD="align: right"]2.789[/TD]
[TD="align: right"]11.02[/TD]
[/TR]
[/TABLE]