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MHT CET 2023 Physics question

PhysicsSystems of Particles and Rotational MotionMHT CET 2023

A ball kept at 20 m height falls freely in vertically downward direction and hits the ground. The coefficient of restitution is 0.4. Velocity of the ball after first rebound is [g = 10 ms]

Answer: (B)

Solution

Speed just before hitting the ground: . The coefficient of restitution is and the ground is at rest, so the rebound speed is

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Question ID VK-096349