A hard rubber ball, not affected by air resistance in its motion, is tossed upward from shoulder height, falls to the sidewalk rebounds to a smaller height, and is caught on its way down again. This motion is represented in Figure OQ2.17, where the successive positions of the ball A through E are not equally spaced in time. At point D the center of the ball is at its lowest point in the motion. The motion of the ball is along a straight, vertical line, but the diagram shows successive positions offset to the right to avoid overlapping. Choose the positive y-direction to be upward. (a) Rank the situations A through E according to the speed of the ball at each point, with the largest speed first. (b) Rank the same situations according to the acceleration of the ball at each point. (In both rankings, remember that zero is greater than a negative value. If two values are equal, show that they are equal in your ranking.)
