Ball spin generation for oblique impacts with a tennis racket

GOODWILL, S. R. and HAAKE, Steve (2004). Ball spin generation for oblique impacts with a tennis racket. Experimental mechanics, 44 (2), 195-206.

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Abstract

In this paper, we describe an experimental investigation of the oblique impact between a tennis ball and head clamped tennis racket. It was found that the magnitude of the ball rebound spin was not a function of the material, gage or tension of the string used in the tennis racket. Furthermore, it was concluded that all strings exhibit a sufficiently large friction coefficient that the ball begins to roll during impact. There is anecdotal evidence from tennis players that suggests that a high string tension or a rough string surface enable them to impart more spin to the ball. For example, players have been quoted as saying that a high string tension makes the strings “bite” into the ball, giving more spin. The data reported in this study do not support these observations. Analysis of the experimental data has shown that the balls are rebounding from the surface with more spin than would typically be associated with rolling. A second experiment showed that the balls commenced rolling at the mid-point of the impact. This information was used in a theoretical model to show that the spin that acts on the ball during the impact can be higher than the value of the rolling spin at the end of the impact.

Item Type:	Article
Uncontrolled Keywords:	tennis, ball, racket, spin
Research Institute, Centre or Group - Does NOT include content added after October 2018:	Centre for Sports Engineering Research
Identification Number:	https://doi.org/10.1007/BF02428179
Page Range:	195-206
Depositing User:	Ann Betterton
Date Deposited:	15 Dec 2008
Last Modified:	18 Mar 2021 11:01
URI:	https://shura.shu.ac.uk/id/eprint/618

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