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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)`

1 Answer

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by (76.6k points)
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Best answer
Correct Answer - B
`A_("rel") = (g + a)`
Since `t = (2u)/(A_("rel"))`
`rArr a = ((2u - g t)/(t))`

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