不同勁度網球拍對恢復係數的影響

蘇 榮立(Rong-Lih Su), 相 子元(Tzyy-Yuan Shiang)

Research output: Contribution to journalArticle

Abstract

The purpose of this pilot study was to investigate the correlation between the stiffness of tennis racket and the coefficient of restitution(COR).The tennis racket was fixed in a clamp and the tennis ball was controlled to hit the racket with a vertical impact at certain speed(approximate 20m/sec). NAC high speed camera (1000 frame/sec) was used to record the whole experimental procedure. The video tape was then digitized using Peak Performance System After statistical analysis, the results showed: The COR of high stiffness racket (stiffness=70)、medium stiffness racket(stiffness=60)and low stiffness racket (stiffness=50)are 0.604, 0.546, 0.472, respectively. According to the ANOVA, the COR of different stiffness rackets are significantly different (stiffness 70>stiffness 60>stiffness 50).
Original languageChinese
Pages (from-to)261-268
Number of pages8
Journal體育學報
Issue number20
DOIs
Publication statusPublished - 1995

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