A-LevelPhysicsWork, energy and powerFeb/Mar 2017Paper 1 Q191 Mark
A car of mass 1400 kg is travelling on a straight, horizontal road at a constant speed of 25 m s⁻¹. The output power from the car's engine is 30 kW. The car then travels up a slope at 2° to the horizontal, maintaining the same constant speed. [Figure showing a car on a horizontal road and then on a slope of 2°, with mass 1400 kg and speed 25 m s⁻¹] What is the output power of the car's engine when travelling up the slope?
A12 kW
B31 kW
C42 kW
D65 kW
✓ Correct Answer
The correct answer is C: 42 kW
📋 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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