1.

Find the magnitude of the vector vec(PQ), its scalar components and the component vectors along the co-ordinate axes, if P and Q have the co-ordinates P(-1,-2), Q(-5,-6)

Answer»

Solution :`vec(PQ) = (-5+1)HATI+(-6+2)HATJ = -4hati-4hatj`
THEREFORE `|vec(PQ)| = SQRT((4)^2+(4)^2 = 4sqrt2
Scalar components are -4, -4, and vector components are -4, -4 and vector components are -4i, -4J.


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