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A ball is hung vertically by a thread of...

A ball is hung vertically by a thread of length `'l'` from a point `'P'` of a clined wall that makes an angle with thte cerical. The thread with the vertical. The thread with the ball is then deviated through a small angle `'beta' (beta gt alpha)` and set free Assuming the wall to tbe perfectly elastic, the period of such pendulum is//are

A

`2sqrt((t)/(g))[sin^(-1)((alpha)/(beta))]`

B

`2sqrt((l)/(g))[(pi)/(2)+sin^(-1)(alpha/(beta))]`

C

`2sqrt((l)/(g))[cos^(-1)(alpha/(beta))]`

D

`2sqrt((l)/(g))[cos^(-1)(-alpha/(beta))]`

Text Solution

Verified by Experts

The correct Answer is:
B, D
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