Questions
A rubber ball is dropped from a height of 5 m on a planet where the acceleration due to gravity is not known. On bouncing, it rises to 1.8 m. The ball loses its velocity on bouncing by a factor of
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Correct option is B
If ball falls from height h1 and bounces back up to height h2 then e=h2h1Similarly if the velocity of ball before and after collision are v1 and v2 respectively then e=v2v1So v2v1=h2h1=1.85=925=35i.e. fractional loss in velocity=1−v2v1=1−35=25
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A tennis ball is released from height h above ground level. If the ball makes inelastic collision with the ground, to what height will it rise after third collision
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