A-LevelPhysicsForces, density and pressureOct/Nov 2018Paper 1 Q141 Mark
The density of the air in the atmosphere decreases as the height h above the surface of the Earth increases. Which graph best shows the variation with height h of the pressure p of the air?
Agraph showing pressure p decreasing linearly with height h.
Bgraph showing pressure p decreasing non-linearly with height h, with a zero initial gradient.
Cgraph showing pressure p decreasing non-linearly with height h, with a negative initial gradient and approaching zero asymptotically.
Dgraph showing pressure p decreasing quadratically with height h.
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of forces, density and pressure within the Physicssyllabus. The examiner's mark scheme requires...
📋 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...
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