A-LevelMathematicsMechanicsMay/June 2021Paper 4 Q68 Marks
A particle A is projected vertically upwards from level ground with an initial speed of 30 m s⁻¹. At the same instant a particle B is released from rest 15 m vertically above A. The mass of one of the particles is twice the mass of the other particle. During the subsequent motion A and B collide and coalesce to form particle C.
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