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MHT CET Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET

A ball kept at 20 m height falls freely in downward direction vertically and hits the ground. The coefficient of restitution is 0.4. After the first rebound the upward velocity is g = 10 m/s² [MHT-CET 2021]

Answer: (B)

Solution

Speed on reaching the ground is m/s and after

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Question ID VK-062453