在普通物理力学中讲授刚体定轴转动动力反作用力的尝试——力学教材改革的思考

An Attempt to Teaching Action-force Reaction of the Fixed-axis Rotation of Rigid Bodies in the General Physical Mechanics ——A Thought on the Reformations of Mechanics Course

从质点组动量定理和角动量定理出发 ,将刚体所受外力区分为给定的主动力和约束力 ,引入转动惯量和惯性积的概念 ,导出刚体定轴转动的动力学普遍方程 ,在普通物理力学的范围内讲授要在理论力学刚体定互转动才研究的定轴运动的动力反作用。探索改革力学教学内容、教材体系的方案 :矢量力学中的主要内容均在普通物理力学中讲授 ,理论力学主要讲分析力学的内容 。

It is general dynamical equation of rotational motion of rigid body about fixed axis that is derived from theorems of momentum and angular momentum of mass point system,active force and constrain force dividend by the extern force of rigid body,and concepts of rotational interia and intera product introduce.It is in general physical mechanics that active force reaction of rotational motion about fixed axis,which has been taught in theorical mechanics before,will be taught.It is a research on reformation of teaching contents of mechanics and program of teaching meterial system that the most contents of vector mechanics will be taught general physical mechanics,but the contents of analysic mechanics will be included into theorical mechanics,in the meantime,a lot of vector mechanical topics,which is not taught in the first of collegesor unversities will be listed.