A-LevelPhysicsWork, energy and powerMay/June 2018Paper 1 Q191 Mark
A car of mass 500 kg is at rest at point X on a slope, as shown. [Diagram] The car's brakes are released and the car rolls down the slope with its engine switched off. At point Y the car has moved through a vertical height of 30 m and has a speed of 11 ms⁻¹. What is the energy dissipated by frictional forces when the car moves from X to Y?
A3.0 × 10⁴ J
B1.2 × 10⁵ J
C1.5 × 10⁵ J
D1.8 × 10⁵ J
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The correct answer is B. 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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