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A simple pendulum is suspended from a pe...

A simple pendulum is suspended from a peg on a vertical wall. The pendulum is pulled away from the wall to a horizontal postion (see fig .) and released. The ball hits the wall, the coefficient fo restituation being `(2)/(sqrt5)` What is the minimum number of collisions after which the amplitude of oscillations becomes less than 60 degress ?

A

`6`

B

`3`

C

`5`

D

`4`

Text Solution

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The correct Answer is:
B
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