An object falls from a height of 10 m above the ground. After striking the ground it loses 50 \% of its kinetic energy. The height upto which the object can rebounce from the ground is:

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Correct answer: D. 5 m

K.E. just before striking the ground K_1=m g h_1=m g(10) K.E. just after striking the ground =K_1-(50)/(100) K_1=(50)/(100) K_1=(K_1)/(2)=K_2 Now, K_2=m g h_2 (K_1)/(2)=m g h_2 (m g(10))/(2)=m g h_2 h_2=5 ~m

An object falls from a height of 10 m above the ground. After...

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