6. What quantity can be calculated from a position-time graph to indicate the velocity of an object? How can that quantity be found if the line on the graph is curved? 7. Use the information in Figure 20 to generate the corre- sponding position-time graph, assuming the position at time t = 0 is 8.0 m [E]. 4.0 v (m/s [ED) 2.0 Figure 20 0 1.0 2.0 3.0 4.0 5.0 Velocity-time t (s) graph 8. In a total time of 2.0 min, a duck on a pond paddles 22 m [360 N of E] and then paddles another 65 m [250 E of S]. Determine the duck's (a) total distance travelled (c) total displacement (b) average speed (d) average velocity