A-LevelPhysicsDynamics9702/12 · May/June 2010 · Q111 Mark
Two equal masses travel towards each other on a frictionless air track at speeds of 60 cm s⁻¹ and 40 cm s⁻¹. They stick together on impact. [Figure 11.1] What is the speed of the masses after impact?
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.
A10 cm s⁻¹
B20 cm s⁻¹
C40 cm s⁻¹
D50 cm s⁻¹
✓ Correct answer
A: 10 cm s⁻¹
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