Physics (AS & A Level) · Oct / Nov 2021 · Paper 41 · Question 4
9702
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A trolley on a track is attached by springs to fixed blocks X and Y, as shown in Fig. 4.1. The track contains many small holes through which air is blown vertically upwards. This results in the trolley resting on a cushion of air rather than being in direct contact with the track. springs L trolley holes track fixed block X Y fixed block Fig. 4.1 The trolley is pulled to one side of its equilibrium position and then released so that it oscillates initially with simple harmonic motion. After a short time, the air blower is switched off. The variation with time t of the distance L of the trolley from block X is shown in Fig. 4.2. 0 10 15 20 25 L / cm t / s 30 4 8 12 16 20 24 Fig. 4.2
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4(a)(i)[1]
4(a)(ii)[2]
4(a)(iii)[2]
4(b)[3]
4(c)[3]
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