A-LevelPhysicsForces, density and pressureMay/June 2015Paper 1 Q201 Mark
The maximum pressure that granite rock can withstand is 2.0 × 10⁸ N m⁻². Above this pressure, the rock begins to flow like a liquid. The density of granite is 2.7 × 10³ kg m⁻³. What would be the height of a pure granite mountain whose base is just beginning to flow?
A3.8 × 10³ m
B7.6 × 10³ m
C3.7 × 10⁴ m
D7.4 × 10⁴ m
✓ Correct Answer
The correct answer is B: 7.6 × 10³ m
📋 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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