A-LevelPhysicsDeformation of solidsMay/June 2011Paper 1 Q241 Mark
The diagram shows the structure of part of a mattress. The manufacturer wants to design a softer mattress (one which will compress more for the same load). Which change will not have the desired effect?
Ausing more layers of springs
Busing more springs per unit area
Cusing springs with a smaller spring constant
Dusing springs made from wire with a smaller Young modulus
✓ Correct Answer
The correct answer is B: using more springs per unit area
📋 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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