空间力系作用下物体的平衡问题对空间想象能力要求较高,涉及未知量和方程也较多,难度一般很大.如果借助高中数学中有关向量的知识,可以减少方程个数,使解决问题的思路简单清晰. Under the action of space force system, the balance problem of objects has higher requirements for spatial imagination ability, more unknowns and equations involved, and the difficulty is generally great. If we use the knowledge about vectors in high school mathematics, we can reduce the number of equations and solve the problems The idea is simple and clear.