Question: (c) Given that y, and v, are two vectors such that y, = (_, ) and , -() Find the angle 0 between y, and

(c) Given that y, and v, are two vectors such that y, = (_, ) and , -() Find the angle 0 between y, and V2. (4 marks) (d) The position vectors of points P and Q, relative to the origin O are -5im and 10 m respectively. At a certain instance, a particle A leaves O with constant velocity (-21 +15j ) ms"' and a particle B leaves P with a constant velocity (31+3j) m s-' . Determine (i) the magnitude and direction of the velocity of A relative to B, (3 marks) (ii) the time taken when these two particles are at their shortest distance apart. (3 marks) [Total : 25 marks]

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