Physics (AS & A Level) · Oct / Nov 2021 · Paper 42 · Question 4

A trolley on a smooth surface is attached by springs to fixed blocks as shown in Fig. 4.1. springs trolley smooth surface fixed block fixed block Fig. 4.1 The trolley oscillates horizontally about its equilibrium position with an amplitude of 12 cm. Fig. 4.2 shows the variation of the acceleration a of the trolley with displacement x from its equilibrium position. Friction between the trolley and the surface can be assumed to be negligible. 0.8 0.4 0 – 0.4 –0.8 0 – 4 –8 –12 4 8 12 x / cm a / m s–2 Fig. 4.2

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