A-LevelPhysicsWork, energy and powerMay/June 2024Paper 1 Q141 Mark
The force resisting the motion of a car is proportional to the square of the car's speed. The magnitude of the force at a speed of 20.0 m s⁻¹ is 800 N. What useful output power is required from the car's engine to maintain a steady speed of 40.0 m s⁻¹?
A32 kW
B64 kW
C128 kW
D512 kW
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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...
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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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