摘要
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.
出处
《浙江体育科学》
2001年第2期48-51,共4页
Zhejiang Sport Science
关键词
铅球
出手角
射程
shot put
angle of delivery
distance