A-LevelMathematicsMechanicsOct/Nov 2025Paper 4 Q49 Marks
A particle P of mass 0.1 kg is projected vertically upwards with speed 30 m s⁻¹ from horizontal ground. At the same instant a particle Q of mass 0.4 kg is projected vertically upwards with speed 10 m s⁻¹ from a height of 15 m above the ground. P and Q move in the same vertical line. When P and Q collide, they coalesce.
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