Physics (AS & A Level) · Feb / March 2019 · Paper 12 · Question 10

Two balls, of masses m and 2m, travelling in a vacuum with initial velocities 2v and v respectively, collide with each other head-on, as shown. After the collision, the ball of mass m rebounds to the left with velocity v. What is the loss of kinetic energy in the collision?

1. A3/4 mv²
2. B3/2 mv²
3. C9/4 mv²
4. D9/2 mv²

As printed in the paper