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When a body is thrown up in a lift with ...

When a body is thrown up in a lift with a velocity `u` relative to the lift, the time of flight is found to be `t`. The acceleration with which the lift is moving up is

A

`(u - g t)/(t)`

B

`(2u - g t)/(t)`

C

`(u + g t)/(t)`

D

`(2u + g t)/(t)`

Text Solution

Verified by Experts

The correct Answer is:
B
`A_("rel") = (g + a)`
Since `t = (2u)/(A_("rel"))`
`rArr a = ((2u - g t)/(t))`
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