A-LevelPhysicsForces, density and pressureOct/Nov 2009Paper 1 Q181 Mark
A rectangular metal bar exerts a pressure of 15 200 Pa on the horizontal surface on which it rests. If the height of the metal bar is 80 cm, what is the density of the metal?
A190 kg m⁻³
B1900 kg m⁻³
C19 000 kg m⁻³
D190 000 kg m⁻³
✓ Correct Answer
The correct answer is B: 1900 kg m⁻³
📋 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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