A-LevelPhysicsWork, energy and powerOct/Nov 2018Paper 1 Q181 Mark

A car of mass 1800 kg accelerates along a horizontal road so that its speed increases from 20 m s⁻¹ to 25 m s⁻¹ in a time of 5.4 s. What is the average useful power output of the car's engine?

Q: What is the correct answer to this A-Level Physics question?

The correct answer is B: 38 kW.

Q: What topic does this question test?

This question tests Work, energy and power in A-Level Physics (syllabus code 9702). It is worth 1 mark.

A4.2 kW

B38 kW

C120 kW

D1100 kW

✓ Correct Answer

The correct answer is B: 38 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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About This A-Level Physics Question

Topic

This multiple-choice question tests Work, energy and power in A-Level Physics (syllabus code 9702). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Physics Oct/Nov 2018 examination, Paper 1 Variant 2.

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