1. A car heading east turns right at a corner. The car turns at a constant speed of 20.0 m/s. After 12 s, the car completes the turn, so that it is heading due south at 20.0 m/s. Calculate the car's average acceleration. T/A [ans: 2.4 m/s [W 45 S]] 2. Over a 15.0 min period, a truck travels on a road with many turns. The truck's initial velocity is 50.0 km/h [W 60.0 N]. The truck's final velocity is 80.0 km/h [E 60.0 N]. Calculate the truck's average acceleration, in kilometres per hour squared. [ans: 2.80 102 km/h [E 21.8 N]] 3. A bird flies from Lesser Slave Lake in northern Alberta to Dore Lake in northern Saskatchewan. The bird's displacement is 800.0 km [E 7.5 S]. The bird then flies from Dore Lake to Big Quill Lake, Saskatchewan. This displacement is 400.0 km [E 51 S]. The total time of flight is 18.0 h. Determine the bird's (a) total distance travelled [ans: 1.2 103 km] (b) total displacement [ans: 1.1 103 km [E 22 S]] (c) average speed [ans: 62 km/h] (d) average velocity [ans: 62 km/h [E 22 S]]