【摘要】 通过简单的力学原理，分析了跳远中助跑与踏跳的相互关系，论证了只有将二者有机地结合起来，才能取得优异成绩。更多还原

【Abstract】 The relationship between run-up and take-off in broad jump is analysed through thesimple principles of mechanies. It is proved that only combination of them organically can result inexcellent achievements.更多还原