论点的合成运动中动点、动系的选择与解题难易的关系

Making Comments on Relation between how Select Moving Points and Moving Systems on the Synthetic Motion of Points with Difficulty and Easy When Doing Exercises

针对点的合成运动一章,学生“听课容易、做题难”,笔者由长期的教学实践总结出突破该难关的方法:熟练掌握并应用本文提出的选取动点,动系的两条原则.

Aiming at the chapter on synthetic motion of points,'students attend class teaching easy, but do exercises difficult'. The author sumed out from teaching practice in a long time the mathods which may break difficult situation that is: Be grasped skillfully and applied the two principles with its to select moving points and moving systems that raised by this Study.