Physics (AS & A Level) · Oct / Nov 2019 · Paper 11 · Question 10

Two gliders are travelling towards each other on a horizontal air track. Glider P has mass 0.30 kg and is moving with a constant speed of 1.2 m s–1. Glider Q has mass 0.60 kg and is moving with a constant speed of 1.8 m s–1. The gliders have a perfectly elastic collision. What are the speeds of the two gliders after the collision?

1. Aspeed of P / m s–1: 1.2; speed of Q / m s–1: 0.6
2. Bspeed of P / m s–1: 2.0; speed of Q / m s–1: 1.4
3. Cspeed of P / m s–1: 2.8; speed of Q / m s–1: 0.2
4. Dspeed of P / m s–1: 3.6; speed of Q / m s–1: 0.6

As printed in the paper