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A body is projected vertically upwards w...

A body is projected vertically upwards with speed u from the top of a tower. It strikes at the ground with speed 3u. What is (a) height of tower and (b) time take by the body to reach at the ground?

A

`H+(u^2)/(2g)`

B

`(u^2)/(2g)`

C

`H+(1)/(2g) ((Mu)/(m+M))^(2)`

D

`H+(1)/(2g) ((mu)/(m+M))^(2)`

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