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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

A block of mass moving on a frictionless surface at speed collides elastically with a block of same mass, initially at rest. Now, the first block moves at an angle with its initial direction and has speed . The speed of the second of the block after collision is [MHTCET 2019]

Answer: (B)

Solution

For an elastic collision of equal masses (one at rest) the final velocities are perpendicular, so and

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Question ID VK-062411