Question

A stopwatch measures a 40-yard dash time of 4.41 s with a percent uncertainty of 4.5%. What is the uncertainty in the time?
4.41 s ± 0.19845 s
4.41 s ± 0.19 s
4.41 s ± 0.198 s
4.41 s ± 0.20 s

Answer 1

Answer:

Explanation:

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Answer 2

Given :  a 40-yard dash stopwatch

measures a  time of 4.41 s

percent uncertainty of 4.5%

To Find : the uncertainty in the time?

Solution:

measures a  time of 4.41 s

percent uncertainty of 4.5%

= (4.5/100) 4.41

= 0.19845

Hence  uncertainty in the time

= 4.41  ±  0.19845 s

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