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A ball A is thrown up vertically with a ...

A ball `A` is thrown up vertically with a speed `u` and at the same instant another ball `B` is released from a height `h`. At time `t`, the speed `A` relative to `B` is

A

u

B

2u

C

u-gt

D

`sqrt((u^2 - "gt"))`

Text Solution

Verified by Experts

The correct Answer is:
A

`v_a = u - g t` (upward)
`v_B = g t` (downward)
Relative velocity A w.r.t B
`v_(AB) = u - g t - (- g t) = u.`
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