碰撞现象与逻辑思维推理

COLLISION PHENOMONA AND LOGICAL REASONING ON THINKING

在物理学史上，伽俐略、马西尔、笛卡儿、惠更斯、马略特和牛顿等著名物理学家都对物体碰撞现象进行过研究。碰撞问题是力学的基本问题之一。但是，在今天的力学课本中，都是直接利用动量守恒定理和机械能守恒定律来处理物体的弹性碰撞，而很少运用思维推理。其实思维推理在物理学中具有重要作用，我们为此特举例说明如何运用思维推理研究碰撞现象。

In the history of physics, Galilco, Marcus, Kenc. Descrates, C. Huygens. E. Mariotte and Newton etc, which are remarkable physicists, had alread studied collision phenomona. Collision problem is one of the basic problem in classical mechanics. However, it is in the teaching book of mechanics today that we usually utilize conservation law of monentumand and conservation law of mechanical energy to deal directly with elastic collision problem among objects and hardly make use of logical reasoning on thinking. In fact, because logical reasoning on thinking is of very important role in physics, we will show two simple examples how to utilize logical reasoning on thinking to study collision phenomona.