Question: A ball is moving with velocity 2 m/s towards a heavy wall which is moving towards the ball with speed 1 m/s. Assume collision

A ball is moving with velocity 2 m/s towards a heavy wall

A ball is moving with velocity 2 m/s towards a heavy wall which is moving towards the ball with speed 1 m/s. Assume collision is elastic. The speed ot ball immediately after collision with wall is (A) 2 m/s (B) 3 m/s (C) 4 m/s (D) 1 m/s

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