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一般解动力学题需对研究物体进行受力分析并选择适当的坐标系,列出联立方程再进行运算得出解答.而力封闭图法意指:对研究物体所受各个力矢量按首尾相连找到合力∑F(∑F与各个力矢量相连先后次序无关),这样物体所受各个力矢量及包括∑F就组成一个力矢量封闭图.
The general solution dynamics problem requires the force analysis of the research object and the selection of the appropriate coordinate system. The simultaneous equations are listed and then the operation is performed to obtain the solution. The force closed graph method means that the individual force vectors of the research object are head-to-tailed. It is connected to find the resultant force ∑F (∑F has nothing to do with the sequence of the individual force vectors), so that the individual force vector and the ∑F include a closed vector of force vectors.