A ball of mass 400 gm is dropped from a height of 5m. A boy on the gro – McqOptions

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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 100 newton so that it attains a vertical height of 20 m. The time for which the ball remains in contact with the bat is \[[g=10\,m/{{s}^{2}}]\] [MP PMT 1999]
A.	0.12s
B.	0.08 s
C.	0.04 s
D.	12 s
Answer» B. 0.08 s

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