1.

A highly elastic ball is released from rest at a distance h above the ground and bounces up and down. With each bounce a fraction f = 1/10 of its KE just before the bounce is lost. The time for which the ball will continue to bounce is nearly (Take g = 10 m//s^(2), h = 5m)

Answer»

1 sec
38 sec
84.3 sec
1.86 sec

Answer :B


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