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When a train starting from rest is unifo...

When a train starting from rest is uniformly accelerating, a plumb bob hanging from the roof of a compartment is found to be inclined at an angle of `45^(@)` with the vertical.The time taken by the train to travel a distance of `1//2km` will be nearly

A

`7s`

B

`10s`

C

`15s`

D

`25s`

Text Solution

Verified by Experts

The correct Answer is:
B
`alpha cos theta= g sin theta, s=ut+1/2 at^(2)`
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