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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

A block of mass 'm' collides with another stationary block of mass '2m'. The lighter block comes to rest after collision. If the velocity of first block is 'u', then the value of coefficient of restitution is [MHT-CET 2020]

Answer: (C)

Solution

Momentum gives so , and

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Question ID VK-062427