A ball of mass 400 gm is dropped from a height of 5 m . 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=10m//s^(2)]

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

1.	A ball of mass 400 gm is dropped from a height of 5 m . 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=10m//s^(2)]
Answer» `0.12s` `0.08` s `0.04` s 12 s Answer :A