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A ring of mass m free to slide on a fixed smooth horizontal rod is attached...

A ring of mass m free to slide on a fixed smooth horizontal rod is attached to a particule of mass M kg by a inextensible string of length l. Initially both M and m are at rest and the string is vertical. A horizontal velocity v0 is imparted to the particule. The maximum height up to which the block will rise with resect to its initial position is (M = 2m)

1) v20 / 2g 2)  v20 / 4g 3)  v20 / 6g 4)  v20 / 8g

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