Physics (AS & A Level) · Oct / Nov 2023 · Paper 11 · Question 10

Two objects move towards each other along the same straight line. After colliding, the two objects stick together and are stationary. Which statement must be correct?

1. AThe total kinetic energy of the two objects does not change during the collision.
2. BThe total momentum of the two objects before the collision is zero.
3. CThe two objects have equal mass.
4. DThe two objects have the same speed before the collision.

As printed in the paper