A-LevelMathematicsMechanicsFeb/Mar 2025Paper 4 Q57 Marks
Three particles P, Q and R, of masses 0.6kg, 0.4 kg and 0.8 kg respectively, are at rest in a straight line on a smooth horizontal plane. The distance from P to Q is 3 m, and the distance from Q to R is also 3 m (see diagram). P is projected directly towards Q with speed 3 ms⁻¹. After P and Q collide, P continues to move in the same direction with speed 1.5 ms⁻¹. [Figure X.X]
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