Question

A ball of mass 0.2 kg falls from a height of 45 m. On striking the ground, it rebounds in 0.1 sec with two thirds of the velocity with which it struck the ground. Calculate
a ) change in the momentum of the ball immediately after hitting the ground
b ) the average force on the ball due to the impact.

Answer 1

(a)change is momentum =-2kgm/s^2

(b)force =-20N