A graph of v(t) is shown above for a world-class track sprinter in a 100m race. Runner Velocity vs. Time Velocity (m/s) 14 12 10 2 0 0 2 4 6 8 10 12 Time (s) a) What is their average velocity for the first 4 s? 6 = 6 m/s b) What is their average acceleration between Os and 4s? 3 = 3 m/s c) What is their instantaneous velocity at t=5 s? 12 = 12 m/s d) What is their average acceleration between Os and 10s? 1.2 = 1.2 m/s e) What is the total distance they have run in 10s? (Careful, they have not finished the 100m race yet). m f) What is their average velocity from Os to 10s? 12 x = 12 m/s g) How long will it take them to finish the 100m race if they continued running at a constant 12m/s to the finish after the 4s time? 6.33 = 6.33 s