一、正交分解法利用正交分解的方法,把各个外力间的矢量关系转化为沿两个坐标轴方向上的力的分量间的代数关系,从而变矢量的几何运算为标量的代数运算.平衡时有∑F=0,即∑Fx=0,∑Fy=0.例1质量为m的物体放在倾角为θ的斜面上,它与斜面间的动摩擦因数为μ.在水平恒力F的作用下,物 1. Orthogonal decomposition method uses orthogonal decomposition method to convert the vector relationship between each external force into an algebraic relationship between the components of the force along the two coordinate axes so that the geometric operation of the variable vector is algebraic operation of the scalar. When there is equilibrium, ∑F=0, that is, ∑Fx=0, ∑Fy=0. Example 1 The object of mass m is placed on an inclined plane with an inclination of θ, and the dynamic friction coefficient between it and the inclined plane is μ. At the horizontal constant force F Under the influence of