Josh and Brian decide to each measure the speed of a battery powered toy car the

Question

Josh and Brian decide to each measure the speed of a battery powered toy car they own by using a stopwatch to time how long it takes the car to travel 1 meter (taking at least 10 trials). Josh finds that it takes the car an average of 6.34 seconds to travel 1m, so he reports a speed of 15.8 cm/sec. Brian measure the speed of the same car to be 14.6 cm/sec. Do Josh and Brian's results agree or disagree? (Hint: use your experience from the previous lab to estimate the range of values that each person measures).

Explanation / Answer

avg speed = 100/6.34

= 15.77 cm/s

so Josh is right

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