Suppose you walk 18.0 m straight west and then 25.0 m straight
north.
How far are you from your starting point?
What is the compass direction of a line connecting your starting
point to your final position?
? ° west of north
(If you represent the two legs of the walk as vector
displacements A and B, as in
Figure 3.23, then this problem asks you to find their sum
R = A + B).