A vehicle is at rest on a slope. It is considered to have three forces acting on it to keep it in equilibrium. They are its weight W, a normal reaction force R and a frictional force F. Which triangle of forces is correct?
✓ Correct Answer
The correct answer is A: Diagram showing W downwards, F upwards-right, R upwards-left, forming a closed triangle.
📋 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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