A-LevelPhysicsDynamics9702/12 · Oct/Nov 2022 · Q111 Mark
Two solid spheres form an isolated system. Sphere X moves with speed 6 cms¯¹ in a straight line directly towards a stationary sphere Y, as shown. [Figure showing sphere X moving towards sphere Y] The spheres have a perfectly elastic collision. After the collision, sphere X moves with speed 2 cm s¯¹ in the same direction as before the collision. What is the speed of sphere Y?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
A2 cms-1
B4 cms-1
C6 cms-1
D8 cms-1
✓ Correct answer
D: 8 cms-1
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