Question

9. 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/s2]
(1) 1/20th of a second
(2) 1/40th of a second
(3) 1/80th of a second
(4) 1/120th of a second​

Answer 1

Answer:

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Answer 2

Answer:

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