A-LevelPhysicsForces, density and pressureOct/Nov 2016Paper 1 Q141 Mark
Which diagram best shows the forces acting on a ball falling at a constant velocity through a liquid?
A[Diagram option A: Upthrust and viscous drag upwards, weight downwards (Upthrust greater than weight)]
B[Diagram option B: Viscous drag upwards, upthrust and weight downwards]
C[Diagram option C: Upthrust upwards, viscous drag and weight downwards]
D[Diagram option D: Upthrust and viscous drag upwards, weight downwards (balanced forces)]
✓ Correct Answer
The correct answer is D. 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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