A-LevelPhysicsWork, energy and power9702/12 · May/June 2018 · 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?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
A3.0 × 10⁴ J
B1.2 × 10⁵ J
C1.5 × 10⁵ J
D1.8 × 10⁵ J
✓ Correct answer
B: 1.2 × 10⁵ J
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