A simple pendulum ia hanging from a per inserted in a vertical wall. Its bob is stretched to horizontal position from wall and is left free to move, the bob hits the wall. If coefficient of restitution is (2)/(sqrt(5)). After how many collision the amplitude of vibration will become less than 60^(@)(Hint : h_(n) le h(1-cos theta))

A simple pendulum ia hanging from a per inserted in a vertical wall. I

1.	A simple pendulum ia hanging from a per inserted in a vertical wall. Its bob is stretched to horizontal position from wall and is left free to move, the bob hits the wall. If coefficient of restitution is (2)/(sqrt(5)). After how many collision the amplitude of vibration will become less than 60^(@)(Hint : h_(n) le h(1-cos theta))
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