A-LevelPhysicsDynamics9702/12 · May/June 2018 · Q91 Mark
An elastic collision occurs between two bodies X and Y. The mass of body X is m and the mass of body Y is 4m. Body X travels at speed v before the collision and speed (3v)/5 in the opposite direction after the collision. Body Y is stationary before the collision. [Diagram] What is the kinetic energy of body Y after the 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.
A(8/10)mv²
B(34/50)mv²
C(16/50)mv²
D(1/5)mv²
✓ Correct answer
C: (16/50)mv²
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