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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.

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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) √gl

(c) √(1.5gl)

(d) √(2gl)

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1 Answer

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Correct Answer is: (a) zero

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