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Work, Energy And Power

Question
CBSEENPH11026299

A ball is released from certain height which losses 50% of its kinetic energy on striking the ground it will contain a height again

  • 14th of initial height

  • 12th of initial height

  • 34th of initial height

  • None of the above

Solution

B.

12th of initial height

Since it loses 50% of its kinetic energy on striking ground, its PE is also reduced by half.   

R     Ratio of heights

                h1h2 = 100100 - 50

                 h2 = h12

                  h2 = 12 of the initial height