A-LevelMathematicsMechanicsMay/June 2022Paper 4 Q14 Marks
Two particles P and Q, of masses 0.3kg and 0.2kg respectively, are at rest on a smooth horizontal plane. P is projected at a speed of 4ms⁻¹ directly towards Q. After P and Q collide, Q begins to move with a speed of 3 ms⁻¹. After the collision, Q moves directly towards a third particle R, of mass mkg, which is at rest on the plane. The two particles Q and R coalesce on impact and move with a speed of 2ms⁻¹.
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