4) Give Reason: It is easier to stop a rubber ball as compared to a plastic ball, when both are travelling with the same speed. *
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The momentum of a body is the product of its mass and velocity i.e. ... In the given information, both the balls move with the same velocity and finally stops, thus force applied to stop the ball will be directly proportional to the mass of the ball.
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A body moves only when a force of certain magnitude in certain direction is applied to it.
The moving body can be stopped when an opposite force of equal magnitude is applied to it.
The mass of a moving tennis ball is less than that of a cricket ball moving at the same velocity. Thus the tennis ball has less momentum than the cricket ball, because of which it is easier to stop a tennis ball than a cricket ball moving with the same velocity. Also it offers more friction. So, it is easier to grip tennis ball.
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