势能函数与刚体的平衡和稳定

物体处在保守力场中的某个位置而具有的能量称为势能．势能存在的条件是物体间存在相互作用的保守力，其性质由保守力而定，数值随状态而变．势能属于整个系统．主要探讨了如何应用势能函数和势能曲线以及势能函数的微分来判断刚体是否处于平衡和平衡的稳定性．

Potential Energy Function and the Balance of Rigid Body

Potential energy is the energy that a subject is on the conservative power field. The exist condition of potential energy is that conservation power is exist between subjects. Potential energy, the property of which is lied on conservative power and numerical value on state, is belonged to the whole system. It is approached that potential energy, potential curve and the differentiation of potential energy function were used to judge whether a subject was in balance and the stability of its balance.