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A pendulum bob of mass "0.1kg" is hung o...

A pendulum bob of mass "0.1kg" is hung on fixed point "A" and it is released from rest horizontally.There is a peg P, 45cm directly below point "A" as shown in the figure.Assume the air resistance is negligible.The speed of the pendulum bob at point B is :- (Take : `g=10m/s^(2)`)

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