A simple pendulum is 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 is2/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 is hanging from a per inserted in a vertical wall. I

1.	A simple pendulum is 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 is2/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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