Chapter 1:
Introduction to Vectors
30.
32.
(a) 
The vector from the tip of r1 to the tip of r2 is the vector d = r2 – r1
Therefore the distance between the two points is the magnitude of the vector d,
(b) 
34.
36.
Taking the positive X-axis to be in the eastward direction
39.
42.
Find C if A – B + 3C = 0
3C = –(A – B)
3C = B – A
