Physics (AS & A Level) · May / June 2022 · Paper 13 · Question 11

Skaters of masses 80 kg and 40 kg move directly towards each other and collide. Before the collision, the heavier skater is moving to the right at a speed of 2.0 m s–1 and the lighter skater is moving to the left at a speed of 1.0 m s–1. After the collision, the heavier skater moves to the right at a speed of 0.80 m s–1. What is the relative speed of separation of the two skaters?

1. A0.6 m s–1
2. B1.4 m s–1
3. C2.2 m s–1
4. D2.6 m s–1

As printed in the paper