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How long will it take to stop a car trav...

How long will it take to stop a car travelling at a speed of `20 m//sec`, if the uniform acc. during braking is `-5 m//s^(2)`?

A

`100 s`

B

`4 s`

C

`(1//4) s`

D

`(1//100)s`

Text Solution

Verified by Experts

The correct Answer is:
B
`v = u + at`
`0 = 20 - 5t`
`:. T = 4s`
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