1.

A ball of mass 400 gm is dropped from a height of 5m. A boy on the ground hits the ball vertically upwards with a bat with an average force of 100N so that it attains a vertical height of 20m. Find the time for which the ball remains in contact with the bat

Answer»

0.12 s
0.24 s
0.36 s
0.48 s

Answer :A


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