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A simple pendulum of mass m and length l...

A simple pendulum of mass m and length l stands in equilibrium in vertical position .The maximum horizontal velocity that should be given to the bob at the bottom so that it completes on revolution is

A

`sqrt(lg)`

B

`sqrt(2lg)`

C

`sqrt(3lg)`

D

`sqrt(5lg)`

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The correct Answer is:
D
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