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[" 27.A ball falls from a holaht such th...

[" 27.A ball falls from a holaht such that is strikes the fioor of lift at "10m/s" .If lift is moving in the upward direction "],[" with a velocity "1m/s" ,then velocity with which the ball rebounds aftor ols the collision will be "],[[" (1) "11m/s],[" (3) "13m/s]]

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