A-LevelPhysicsDynamicsMay/June 2025Paper 1 Q131 Mark
An empty cart is moving along a horizontal track at a constant velocity. Resistive forces acting on the cart are negligible. A heavy rock is dropped vertically into the cart. [Diagram shows a cart moving right, with a rock falling vertically into it.] The cart continues to move horizontally with the rock inside. How does the momentum and kinetic energy of the cart with the rock inside compare with the momentum and kinetic energy of the empty cart?
AThe cart with the rock inside has a smaller momentum and a smaller kinetic energy.
BThe cart with the rock inside has a smaller momentum and the same kinetic energy.
CThe cart with the rock inside has the same momentum and a smaller kinetic energy.
DThe cart with the rock inside has the same momentum and the same kinetic energy.
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of dynamics within the Physicssyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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