A sphere falls from rest through the air. The graph shows the variation with time of the sphere's velocity. [Figure 10.1] Which diagram shows the forces acting on the sphere when it is at the velocity corresponding to point P on the graph?
✓ Correct Answer
The correct answer is C: diagram showing a sphere with air resistance pointing upwards and weight pointing downwards, with the weight vector equal in length to the air resistance vector.
📋 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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