Question
A rubber ball is dropped from a height of 2 metres. To
what height will it rise if there is no loss of energy/velocity after rebounding?Solution
The potential energy of a body when raised through height h is given by mgh. Eachtime, a normal rubber ball hitsthe floor, it losesone-fifthofitstotalenergyandtherebound heightisproportionaltoenergy,soeachbounce will rebound to four-fifth of the previous bounce.
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