Which statement is the BEST analysis of the data for the runner? A The runner starts slower and speeds up, reaching a maximum speed between 50 and 70 m, and then slows down during the final 30 m.
B. The runner covers the first 80 m running at a constant speed and then slows down, reaching a minimum speed during the final 20 m
CO The runner starts siower and speeds up, reaching a constant speed between 20 and 80 m, and then speeds up again during the final 20 m
D. The runner covers the first 70 m running at a constant speed and then speeds up, reaching a maximum speed during the final 30 m.
no

Aball is thrown from the top of a building with an initial velocity of 21.9 m/s straight upward, at an initial height of 51.6 m above the ground. the ball just misses the edge of the roof on its way down, as shown in the figure. (a) determine the time needed for the ball to reach its maximum height. (b) determine the maximum height. (c) determine the time needed for the ball to return to the height from which it was thrown, and the velocity of the ball at that instant. (d) determine the time needed for the ball to reach the ground. (e) determine the velocity and position of the ball at t = 5.35 s.