A-LevelPhysicsForces, density and pressureFeb/Mar 2017Paper 1 Q141 Mark
An object hangs by means of two cords around two rods, as shown. [Figure showing an object suspended by two cords around two rods, with forces F₁, F₂ and angle θ indicated] The object is held in equilibrium by the forces F₁ and F₂. The object weighs 10 N. There is negligible friction between the rods and cords. Angle θ is 90°. Which row of the table gives an angle θ of 90°?
AF₁/N: 4.0, F₂/N: 6.0
BF₁/N: 6.0, F₂/N: 4.0
CF₁/N: 6.0, F₂/N: 8.0
DF₁/N: 8.0, F₂/N: 6.0
✓ Correct Answer
The correct answer is C: F₁/N: 6.0, F₂/N: 8.0
📋 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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