A ball falls from a height such that it stricks the floor of lift at 10 m/s . if lift is moving in the upward direction with a velocity 1 m/s , then velocity with the ball rebounds after elastic collision will be then
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Relative velocity of ball w.r.t lift =10+1=11m/s.
Collision is elastic therefore ball rebound with velocity relative to lift=11m/s.
But the velocity w.r.t ground=11+1=12m/s.
Explanation:
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