A ball is dropped on a floor from a height of 5 meter. It rebounds to a height of $3.2$ metre. If the ball as in contact with the floor for $0.1 sec$.,
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A ball is dropped on a floor from a height of 5 meter. It rebounds to a height of $3.2$ metre. If the ball as in contact with the floor for $0.1 sec$., then calculate its average acceleration during the contact, take $g=10$ $m / sec ^{2}$

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Answer : 180 m/s2 (Upward)

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