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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

A body of mass 'm' is suspended from the rigid support by an inextensible string of length 'L' on which another identical body of mass 'm' struck in-elastically moving with horizontal velocity . The increase in the tension just after it is struck by the body is (g = acceleration due to gravity) [MHT-CET 2021, MHT-CET 2021]

Answer: (C)

Solution

Momentum conservation gives for the combined mass , so

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Question ID VK-040950