A-LevelPhysicsWork, energy and powerMay/June 2020Paper 1 Q171 Mark
An escalator in an underground station has 25 people standing on it and is moving with a speed of 4.3 m s⁻¹. The average mass of a person is 78 kg and the angle of the escalator to the horizontal is 40°. What is the minimum power required to lift these people?
A5.4 kW
B6.4 kW
C53 kW
D63 kW
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of work, energy and power within the Physicssyllabus. The examiner's mark scheme requires...
📋 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...
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