Physics (AS & A Level) · May / June 2026 · Paper 13 · Question 9
9702Linear momentum and its conservation
The diagram shows an object on a horizontal air track moving with velocity u towards a stationary identical object. The objects collide and stick together. The objects then move along the track with velocity v. Assume there is no friction between the objects and the track. What is the effect of the collision on the total momentum and the total kinetic energy of the objects?
- Aconserved / changed
- Bconserved / unchanged
- Cnot conserved / changed
- Dnot conserved / unchanged
As printed in the paper
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Correct answer: A. conserved / changed
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