A-LevelPhysicsDynamics9702/12 · Oct/Nov 2009 · Q81 Mark
The diagram shows two spherical masses approaching each other head-on at an equal speed u. One has mass 2m and the other has mass m. [Figure 8.1] Which diagram, showing the situation after the collision, shows the result of an elastic collision?
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.
A2m mass moving left with speed u/3, m mass moving left with speed 5u/3
B2m mass moving left with speed u/6, m mass moving left with speed 2u/3
C2m mass moving left with speed u/6, m mass moving right with speed 2u/3
Dthe spheres stick together and move left with speed u/3
✓ Correct answer
A: 2m mass moving left with speed u/3, m mass moving left with speed 5u/3
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