Suppose you walk 18.0 m straight west and then 25.0 m straight north. How far are you from your starting point, and what is the compass direction of a line connecting your starting point to your final position? (If you represent the two legs of the walk as vector displacements A and B , as in Figure 3.50, then this problem asks you to find their sum R=A+B .)

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B A R 0 y A + B = R X W N Z4 S E