Physics (AS & A Level) · Oct / Nov 2025 · Paper 13 · Question 10

An object of mass m moving with velocity 9.0 m s–1 has a head-on elastic collision with a stationary object of mass 2m. After the collision, both objects are moving. No external forces act on the system. What is the velocity of the object of mass 2m after the collision?

1. A–6.0 m s–1
2. B–3.0 m s–1
3. C4.5 m s–1
4. D6.0 m s–1

As printed in the paper