A-LevelMathematicsMechanicsOct/Nov 2022Paper 4 Q69 Marks
Three particles A, B and C of masses 0.3 kg, 0.4kg and mkg respectively lie at rest in a straight line on a smooth horizontal plane. The distance between B and C is 2.1 m. A is projected directly towards B with speed 2 ms⁻¹. After A collides with B the speed of A is reduced to 0.6ms⁻¹, still moving in the same direction.
📋 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...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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