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If a train travelling at 72 km/h is to b...

If a train travelling at 72 km/h is to be brought to rest in a distance of 200m, then its retardation should be:-

A

`20ms^(-2)`

B

`10ms^(-2)`

C

`2ms^(-2)`

D

`1ms^(-2)`

Text Solution

Verified by Experts

The correct Answer is:
D
Stoping distance = (u^2)/(2a)`
`rArr a = ((72 xx 5/18)^2)/(2xx200) = ((20)^2)/(400) = 1m//s^2`
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