A-LevelPhysicsWork, energy and powerMay/June 2016Paper 1 Q171 Mark
A boy on a bicycle starts from rest and rolls down a hill inclined at 30° to the horizontal. The boy and bicycle have a combined mass of 25 kg. There is a frictional force of 30 N, which is independent of the velocity of the bicycle. What is the kinetic energy of the boy and the bicycle after rolling 20m down the slope?
A1850 J
B2450 J
C3050 J
D3640 J
✓ Correct Answer
The correct answer is A: 1850 J
📋 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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