A bungee jumper jumps off a high bridge, when attached to it by a long elastic rope which obeys Hooke's law. The gravitational potential energy of the jumper is measured relative to the lowest point reached by the jumper. Which graph shows the variation of the gravitational potential energy of the jumper, and the elastic potential energy in the rope, with the vertical distance fallen from the top of the bridge?
✓ Correct Answer
The correct answer is A: [Graph A shows elastic potential energy (solid line) increasing quadratically from zero and gravitational potential energy (dashed line) decreasing linearly from a maximum]
📋 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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