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How long would it take a car, starting f...

How long would it take a car, starting from rest and accelerating uniformly in a straight line at `5 m//s^(2)`, to cover a distance of 200 m ?

A

9.0 s

B

10.5 s

C

12.0 s

D

15.5 s

Text Solution

Verified by Experts

The correct Answer is:
A
Use Big Five #2 with `v_(0)=0`.
`Delta s = v_(0)t+(1)/(2)at^(2)=(1)/(2)at^(2) implies t = sqrt((2 Delta s)/(a))= sqrt((2(200 m))/(5 m//s^(2)))=9 s`
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