A-LevelPhysicsForces, density and pressureMay/June 2018Paper 1 Q131 Mark
A uniform diving-board is held by two fixed rods at points P and Q. A person stands at end R of the diving-board, as shown. [Diagram] The forces exerted by the rods on the board are vertical. The board remains in equilibrium as the person slowly moves towards point Q from end R. Which row describes the changes to the forces exerted by the rods on the board?
Adecreases, decreases
Bdecreases, increases
Cincreases, decreases
Dincreases, increases
✓ Correct Answer
The correct answer is A: decreases, decreases
📋 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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