A simple pendulum is hanging from a peg inserted in a vertical wall. I – McqOptions

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1.	A simple pendulum is hanging from a peg inserted in a vertical wall. Its bob is stretched in horizontal position from the wall and is left free to move. The bob hits on the wall the coefficient of restitution is \[\frac{2}{\sqrt{5}}\]. After how many collisions the amplitude of vibration will become less than 60° [UPSEAT 1999]
A.	6
B.	3
C.	5
D.	4
Answer» C. 5

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