A-LevelMathematicsMechanicsOct/Nov 2020Paper 4 Q45 Marks
The diagram shows a velocity-time graph which models the motion of a car. The graph consists of four straight line segments. The car accelerates at a constant rate of 2 m s⁻² from rest to a speed of 20 m s⁻¹ over a period of T s. It then decelerates at a constant rate for 5 seconds before travelling at a constant speed of V m s⁻¹ for 27.5 s. The car then decelerates to rest at a constant rate over a period of 5 s.
📋 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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