一、引言随着体育科学的发展,目前我们对运动现象的研究已经逐步地从定性研究进入了定量研究阶段,国内外科研人员对体育科学的应用研究日益重视。在对铅球运动的研究中,有人靠测定铅球飞行时间(铅球出手到落地的时间间隔)来计算铅球出手时的初速度和掷投角。这是一种不同于以往评定运动员投掷技术的、较实用的研究方法。在以往对铅球运动规律的讨论中,一般是通过数理方法,将飞行时间从公式中消去,然后讨论初速度、投掷角和投掷远度的关系;而上面提 I. INTRODUCTION With the development of sports science, at present, our research on sports phenomenon has gradually entered the quantitative research stage from qualitative research. At home and abroad, the research on sports science has paid more and more attention. In the study of shot putting, some people rely on the determination of shot flight time (shot shot to the landing of the time interval) to calculate shot when shot the initial velocity and throw angle. This is a different from the previous assessment of athletes throwing technology, more practical research methods. In the past on the law of the shot put the discussion, usually through mathematical methods, the flight time will be eliminated from the formula, and then discuss the initial speed, throwing angle and throwing distance relationship; the above