Physics (AS & A Level) · May / June 2023 · Paper 21 · Question 3
9702
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A block is pulled in a straight line along a rough horizontal surface by a varying force X, as shown in Fig. 3.1. momentum p force X rough horizontal surface block Fig. 3.1 Air resistance is negligible. Assume that the frictional force exerted on the block by the surface is constant and has magnitude 2.0 N. The variation with time t of the momentum p of the block is shown in Fig. 3.2. 0 0 1 2 3 4 5 t / s p / kg m s–1 6 1 2 3 4 5 6 7 Fig. 3.2
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