A-LevelPhysicsWork, energy and powerFeb/Mar 2018Paper 1 Q141 Mark
A car of mass 1100 kg is travelling at a constant speed of 15 ms⁻¹ up a slope inclined at 10° to the horizontal. The combined frictional forces acting on the car are directed down the slope and are equal to W/5, where W is the weight of the car. [Figure 14.1] What is the useful output power of the car's engine?
A28 kW
B32 kW
C60 kW
D190 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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