摘要
解决了关于自然坐标系的混乱状况。弧坐标没有意义。s根本不是弧坐标,而是路程。一切质点在无穷小时间dt内均绕曲率中心作圆周运动。牛顿第二定律在绝对空间任何一个方向上都是正确的。切线和法线都无方向,切线轴的正向为速度的方向。自然坐标系的目的不是确定其他质点在空间的位置,而是为了应用牛顿第二定律以解决实际问题。
The article solves the confused problem of natural coordinate system, pointing out that arc coordinates are meaningless; s is distance instead of arc coordinate; all particles move around the curvature centre within the minimal time dt. Newton＇s second law is right in any direction of the absolute space. Both the tangent line and the normal line are directionless, the forward direction of the tangent line is the direction of the speed. The purpose of the natural coordinate system is not to determine the special location of other particles but to solve the problem using Newton＇s second law.
出处
《贵阳学院学报（自然科学版）》
2007年第4期9-12,27,共5页
Journal of Guiyang University：Natural Sciences
关键词
自然坐标系
内禀方程
向心加速度
路程
微分
natural coordinate system
intrinsic equation
centripetal acceleration
distance
differential
