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当物体处于平衡状态时,满足合力为零的条件,同时也满足合力矩为零的条件。从这两个平衡条件出发建立方程,原则上可解决任何平衡问题。
When the object is in an equilibrium state, the condition that the resultant force is zero is satisfied, and the condition that the resultant moment is zero is also satisfied. To establish an equation from these two equilibrium conditions can in principle solve any equilibrium problem.