A-LevelPhysicsDynamicsOct/Nov 2011Paper 1 Q101 Mark
A group of students investigating the principle of conservation of momentum use a small truck travelling over a frictionless surface. Sand is dropped into the truck as it passes X. At Y, a trapdoor in the bottom of the truck opens and the sand falls out. [Figure 10.1] How does the velocity of the truck change when the sand is added to the truck at X and then leaves the truck at Y?
Adecreases at X, increases at Y
Bdecreases at X, stays the same at Y
Cstays the same at X, increases at Y
Dstays the same at X, stays the same at Y
✓ Correct Answer
The correct answer is B. 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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