A-LevelMathematicsMechanicsOct/Nov 2019Paper 4 Q25 Marks
The diagram shows a velocity-time graph which models the motion of a tractor. The graph consists of four straight line segments. The tractor passes a point O at time t = 0 with speed U m s⁻¹. The tractor accelerates to a speed of V m s⁻¹ over a period of 5 s, and then travels at this speed for a further 25 s. The tractor then accelerates to a speed of 12m s⁻¹ over a period of 5 s. The tractor then decelerates to rest over a period of 15 s. [Figure 2.1]
📋 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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