A particle of mass m moved in the XY plane with a velocity V = Ai + Bj; where A and B are constants. At the instant t = 0, the force F = Ct * j began to act on the particle. Find: a) the dependence of the velocity vector of the particle on time after the onset of the action of the force; b) the time dependence of the angle that makes up the velocity vector with the X axis.

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