A-LevelPhysicsDynamics9702/12 · Feb/Mar 2025 · Q71 Mark
Objects P and Q form an isolated system. Object P has mass 6.0 kg and is moving at a speed of 3.0 m s⁻¹. Object Q has mass 2.0 kg and is moving at a speed of 4.2 m s⁻¹ at an angle of 35° to the path of P. [Figure 7.1] Objects P and Q collide and stick together. What is the magnitude of the component of the final momentum of the combined objects in the original direction of P?
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.
A9.6 kg m s⁻¹
B11 kg m s⁻¹
C13 kg m s⁻¹
D25 kg m s⁻¹
✓ Correct answer
B: 11 kg m s⁻¹
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