Physics (AS & A Level) · Oct / Nov 2020 · Paper 12 · Question 10

Two balls, one of mass 2m and one of mass m, collide. The diagrams show the initial and final velocities of the balls. Which collision is not elastic?

1. Abefore: 2m at 4.0 m s–1, m at 1.0 m s–1; after: 2m at 2.0 m s–1, m at 5.0 m s–1
2. Bbefore: 2m at 6.0 m s–1, m at 3.0 m s–1; after: 2m at 4.0 m s–1, m at 7.0 m s–1
3. Cbefore: 2m at 8.0 m s–1, m at 2.0 m s–1; after: 2m at 5.0 m s–1, m at 8.0 m s–1
4. Dbefore: 2m at 10.0 m s–1, m at 4.0 m s–1; after: 2m at 6.0 m s–1, m at 12.0 m s–1

As printed in the paper