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A particle of mass m is fixed to one end...

A particle of mass `m` is fixed to one end of a light rigid rod of length `l` and rotated in a vertical circular path about its other end. The minimum speed of the particle at its highest point must be

A

Zero

B

`sqrt(gl)`

C

`sqrt(1.5gl)`

D

`sqrt(2 gl)`

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The correct Answer is:
A
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