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The periodic time of a simple pendulum of length 1 m and amplitude 2 cm is 5 seconds. If the amplitude is made 4 cm, its periodic time in seconds will be

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a
2.5
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10
d
52

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detailed solution

Correct option is B

As periodic time is independent of amplitude.


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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 25. After how many collisions the amplitude of vibration will become less than 60°


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