The basic setup for this experiment is shown in Figure 1. We used a wooden 2-meter stick to set a uniform height, h0 = 1.8 m, from which we dropped a basketball and to measure the height h of its rebound. As shown in Figure 1, h0 was measured from the floor to the bottom of the ball, while h was measured from the floor to the top of the ball, in accordance with international rules (Fédération Internationale de Basketball 1998). We used a video camera to record the motion of the basketball. By examining the video recording frame-by-frame, we could capture the ball at the top of its rebound.The video camera we used was an 8-mm format (Sony model CCD-F301). The resolution of the image in the “stop-action” frame was the critical factor in determining