A ball of mass 50g is dropped from a height of 20m.a boy on the ground hits the ball vertically upwards with a bat with an average force of 200N;so that it attains vertical height of 45m.what is the time for which the ball remains in contact with the bat?

Q. A ball of mass 50 g is dropped from a height of 20 m.A boy on the ground hits the ball vertically upwards with a bat with an average force of 200 N, so that it attains a vertical height of 45 m. The time for which the ball remains in contact with the bat is [Take g= 10 m/s${}^2$]

Q. A ball of mass $50\text{g}$ is dropped from a height of $20\text{m}$. A boy on the ground hits this ball vertically upward with a bat with an average force of $200\text{N}$ so that it attains a vertical height of $45\text{m}$. The time for which the ball remains in contact with this bat is
$[$Take $g=10{\text{m/s}}^2]$