Question

A rubber ball with a mass of 0.130 kg is dropped from rest. From what height was the ball dropped, if the magnitude of the ball's momentum is 0.710 kg · m/s just before it lands on the ground?

Answer 1

Momentum formula:

p=mv

where
p=momentum
m = mass
v= velocity

p/m = v

once you solve for v

now apply:
v^2=v_i + 2*g*h

v=what you got from momentum
v_i = starting speed = 0
g= 9.81
h=?????