Physics (AS & A Level) · May / June 2017 · Paper 12 · Question 8

A golf ball of mass m is dropped onto a hard surface from a height h1 and rebounds to a height h2. The momentum of the golf ball just as it reaches the surface is different from its momentum just as it leaves the surface. What is the total change in the momentum of the golf ball between these two instants? (Ignore air resistance.)

1. A$m\sqrt{2gh_1} - m\sqrt{2gh_2}$
2. B$m\sqrt{2gh_1} + m\sqrt{2gh_2}$
3. C$m\sqrt{2g(h_1 - h_2)}$
4. D$m\sqrt{2g(h_1 + h_2)}$

As printed in the paper