Practice 1. Use a scale diagram to determine the sum of each pair of displacements. TA C (a) Ad, = 72 cm [W], Adz = 46 cm [N] [ans: 85 cm [W 33" NJ] (b) Ad, = 65.3 m [E 42" N], Adz = 94.8 m [S] [ans: 70.5 m [E 46* S] 2. A cyclist travels 450 m [W 35 S] and then rounds a corner and travels 630 m [W 60 N]. (a) What is the cyclist's total displacement? [ans: 740 m [W 23* N]] (b) If the whole motion takes 77 s, what is the cyclist's average velocity? [ans: 9.6 m/'s [W 23* N]