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[" 4.A ball weighing "10g" hits a hard s...

[" 4.A ball weighing "10g" hits a hard surface vertically "],[" with a speed of "5m/s" and rebounds with the same "],[" speed.The ball remains in contact with the surface "],[" for "(0.01)s" .The average force exerted by the "],[" surface on the ball is :- "],[[" (1) "100N," (2) "10N],[" (3) "1N," (4) "0.1N]]

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