Atennis ball is dropped from 1.43 m above the
ground. it rebounds to a height of 0.945 m.
with what velocity does it hit the ground?
the acceleration of gravity is 9.8 m/s
2. (let
down be negative.)
answer in units of m/s
(this i already know -5.29 but i just don't know how to continue and do the rest of the parts)

part 2
with what velocity does it leave the ground?
answer in units of m/s.

part 3
if the tennis ball were in contact with the
ground for 0.00638 s, find the acceleration
given to the tennis ball by the ground.
answer in units of m/s
2.