摘要
在求解理论力学质点动力学问题时,因坐标系正方向的选取常常给学生带来许多困惑.通过两道典型习题,详细分析学生错解的原因,应用不同的符号法则给出正确的求解过程,对比总结出坐标系建立的一般方法及解题中关键问题.帮助学生澄清疑惑,提高规范严谨的解题能力.
In theoretical physics, students encounter many difficulties when choosing different positive direction of coordinate system. By solving two basic particle dynamic problems discuss the wrong results commonly seen in students＇derivation and point out the problems needing more attention. And the correct results are given in more detail to illustrate the specification of choosing the direction of coordinate system. The usual method of coordinate system setting and the key points related are also summarized.
出处
《高师理科学刊》
2014年第3期62-65,共4页
Journal of Science of Teachers＇College and University
关键词
坐标轴正方向
矢量投影量
自然坐标系
切向坐标轴
曲率半径
coordinate axis direction
vector projection
natural coordinate system
direction of the tangent
radius of the curvature
