动点—动系选择中若干问题的商榷  

Some Comments on Selecting Moving Point and Moving Coordinate

作　　者：陈奎孚[1] 王建立[2] 

机构地区：[1]中国农业大学理学院,北京100083 [2]邢台职业技术学院基础课部,河北邢台054035

出　　处：《邢台职业技术学院学报》2008年第3期1-2,7,共3页Journal of Xingtai Polytechnic College

摘　　要：本文整理了文献中关于动点—动系选择的四条原则,论证了其中最基本两条的合理性。而另外两条作为恰当性原则有助于解决某些特定问题。对文献中一些提法进行了讨论,并给出了若干反例,包括"动点动系选择的唯一准则","动点是否必须要动"和"相对速度的理解"等。The principles for selecting a moving point and a moving coordinate are reviewed. Four items can be condensed from literature. Two of them are essential, and their importance is discussed. Other two items are not essential, but are practical in solving specific problems. Some statements from literature are argued in light of counter examples. These statements include “the unique rule for selecting moving point and moving coordinate”, “the move point must move”, “the relative velocities must be equal reciprocally”, etc.

关 键 词：合成运动 动点 动系 

分 类 号：O313.3[理学—一般力学与力学基础]