Question

7
19. A rubber ball dropped from a height of 20m
(g=10m/s2) falls on the roof of an elevator
going up at 2 m/s. If the collision of the ball
with the elevator is elastic, the ball rebounds
by with a velocity of
ор 1) 20m/s 2) 22m/s 3) 24m/s 4) 26m/s
71​

Answer 1

Answer:

"24m"

Explanation:

Hope it helps you!!!!!!

Answer 2

e=v2-v1/u2-u1

l=2-v1/-20-2

=24m/s