摘要
探究轮滑运动双蹬技术的外刃蹬地动作是否在前进方向产生了加速度,运用数理演绎方法进行分析。结果:外刃蹬地动作在水平方向上只能产生一个不大的侧向力,当右脚外刃蹬地动作的滑行轨迹处于以运动员总运动方向为y轴的直角坐标系的第Ⅱ象限、或左脚外刃蹬地动作的滑行轨迹处于同一直角坐标系第Ⅰ象限时这个侧向力指向运动员总运动方向的侧后方,产生的加速度与总运动方向呈负值。结论:双蹬技术外刃蹬地动作在水平方向上只能产生一个不大的与总运动方向相反的加速度。
The mathematical deduction hns been applied to investigate if the outer- edge push in double- push technique can efficiently accelerate forward in slide. The results demonstrate that it can produce a slight lateral force, being true of the centripetal force in cure movement. When the curve track for right feet locates in the second quadrant, or that for left feet locates in the first quadrant of the rectangular coordinate system using moving direction as y - axis, the force will be opposite to the moving direction, and thus no positive contribution can be achieved. Therefore, the slight acceleration in apposite to the moving direction will be produced by the outer- edge push in double - push technique.
出处
《吉林体育学院学报》
2011年第6期66-68,共3页
Journal of Jilin Sport University
关键词
双蹬技术
支撑腿
外刃蹬地
倾斜
速度
加速度
方向
double - push technique
standing leg
outer - edge push
eline
speed
acceleration
direction
