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
Text Solution
Verified by ExpertsThe correct answer is:
B
If ball falls from height 
and bounces back up to height 
then 
Similarly, if the velocity of ball before and after collision are 
and 
respectively then 
So 
i.e. fractional loss in velocity 
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