A-LevelPhysicsWork, energy and powerFeb/Mar 2020Paper 1 Q181 Mark
A car travels at a constant speed of 25 ms¯¹ up a slope. The wheels driven by the engine exert a forward force of 3000 N. The total force due to air resistance and friction is 2100 N. The weight of the car has a component down the slope of 900 N. What is the rate at which thermal energy is dissipated?
Azero
B2.3 × 104 W
C5.3 × 104 W
D7.5 × 104 W
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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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