Abstract
In this research, the impact between the racket and the ball was studied experimentally. The behavior of the ball during the impact was analyzed using high speed images. The purpose of this research is to clarify the effect of both impact area and strings tension on the rotational speed and the velocity of ball after impact. The deformation of the ball, the impact time, and the movements of the ball during the impact were studied experimentally. According to the experimental results, the following conclusions can be obtained. It was found that the rotational speed and the velocity after the impact increased with increasing deformation of the strings and decreasing deformation of the ball. Moreover, the rotational speed and the velocity after the impact increased with increasing impact time. And, the rotational speed of the ball after the impact increased with increasing displacement of the ball in the parallel direction to the surface of the strings.
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