对推铅球最佳出手角的研究

The best angle of delivery in shot put

运用力学原理 ,经分析和数理推导 ,提出因助跑速度和最后用力使铅球所产生的速度方向不同 ,滑步推铅球的出手初速度是随出手角改变而变化的变量 ,原理论“最佳出手角”是以出手初速度为定量的基础上推算出来的 ,仅适用于原地推铅球 ,并推导出随出手角变化 ,出手初速度和射程的计算公式 ,分析助跑速度和出手角变化对出手初速度和射程的影响 ,提出新的最佳出手角。

By applying mechanical principles and analyzing and mathematical derivation,this paper suggests that,because of the difference in the run*.up velocity and the difference brought about by the force exerted on the shot,the initial speed in glide shot put is a variable that varies with the angle of delivery;and that the former theory of “the best angle of delivery”is based upon the initial as a ration,which can only be applied to non*.slide shot put.And in this paper the author also derives a calculating formula of initial speed and range according to the change of the angle of delivery and also anagyzes how run*.up velocity and angle of delivery affect the initial speed and throwing distance and thus derives a new best angle of delivery.