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A hollow vertical cylinder of radius r a...


A hollow vertical cylinder of radius r and height h has a smooth internal surface. A small particle is placed in contact with the inner side of the upper rim, at point A, and given a horizontal speed u, tangentical t the rim. it leaves the lower rim at point B, vertically below A. If n is an integer then

A

`(u)/(2pir)sqrt(2h//g)=n`

B

`(h)/(2pir)=n`

C

(2pir)/(h)=n`

D

`(u)/(sqrt(2gh))=n`

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