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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

A block of mass 'm' moving on a frictionless surface at speed 'V' collides elastically with a block of same mass, initially at rest. Now the first block moves at an angle 'θ' with its initial direction and has speed 'V₁'. The speed of the second block after collision is [MHT-CET 2020]

Answer: (A)

Solution

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

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Question ID VK-062426