A-LevelPhysicsWork, energy and power9702/12 · Oct/Nov 2009 · Q141 Mark

Two trolleys are placed together on a horizontal runway with a compressed spring between them. [Figure 14.1] When they are released, the 2 kg trolley moves to the left at 2 m s⁻¹. How much energy was stored in the spring?

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A4 J

B6 J

C8 J

D12 J

✓ Correct answer

D: 12 J

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Topic: Work, energy and power, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2009 Paper 1 Variant 2, question 14.

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