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)

Explanation

`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.