用dE／dt=0探讨几个刚体动力学问题

Probe into A Few Object Mechanical Problems by dE/dt=0

用ｄＥ／ｄｔ＝０这种新的方法对在不同坐标系下的几类刚体力学问题进行探讨，从而得出力学体系下的刚体运动方程。

dE/dt=0 is used as a new approach to analyze a few object mechanical problems in different coordinate systems and then a motional equation of object mechanical systems is finally to be obtained.