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A ball is moving with a velocity v1=15m*...

A ball is moving with a velocity `v_1=15m*s^(-1)`. When hit by a racket , it returns in the opposite direction at a velocity `v_2=20m*s^(-1)`. If the change in kinetic energy is `DeltaE =8.75J`, find the change in the magnitude of the momentum of the ball.

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The correct Answer is:
`3.5 kg*m*s^(-1)`
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