A-LevelPhysicsForces, density and pressureFeb/Mar 2025Paper 1 Q111 Mark
A shop sign weighing 75 N hangs from a frame attached to a vertical wall. [Figure 11.1] The frame consists of a horizontal rod XY and a rod YZ that is at an angle of 30° to the horizontal. Rod XY is attached to the wall by a hinge at X and has length 0.50 m. Assume that the weights of the rods are negligible. What is the horizontal force exerted by the wall on rod XY?
A0 N
B43 N
C130 N
D150 N
✓ Correct Answer
The correct answer is C: 130 N
📋 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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