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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

A small sphere of mass kg is moving with a velocity m/s. It hits a fixed smooth wall and rebounds with velocity m/s. The coefficient of restitution between the sphere and the wall is . Find the value of .

Answer: 9

Solution

For a smooth wall, the tangential velocity component is unchanged, so is purely along the wall's normal . Normal components: $Missing argument for \vec\vec

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Question ID VK-158837