A child bounces a 54 g superball on the side-

Question

walk. The velocity change of the superball is
from 23 m/s downward to 19 m/s upward.
If the contact time with the sidewalk is
1
800
s, what is the magnitude of the average force
exerted on the superball by the sidewalk?

Answer 1

fal 5mod 3= 150