A-LevelMathematicsMechanicsOct/Nov 2023Paper 4 Q38 Marks
The diagram shows the velocity-time graph for the motion of a bus [Figure 3.1]. The bus starts from rest and accelerates uniformly for 8 seconds until it reaches a speed of 12.6ms¯¹. The bus maintains this speed for 40 seconds. It then decelerates uniformly in two stages. Between 48 and 62 seconds the bus decelerates at am s¯² and between 62 and 70 seconds it decelerates at 2ams¯² until coming to rest.
📋 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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