正交分解法是高中物理中使用频率较高的一种方法.所谓正交分解,就是将力沿着两个相互垂直的x轴、y轴分解,分解之后x轴上的合力Fx=F1x+F2x+F3x+…,y轴上的合力Fy=F1y+F2y+F3y+….这样做的优点是将矢量运算转化为代数运算.建立坐标系时,应以少分解力和容易分解力为原则,尽量不分解未知力或少分解未知力.在一些问题中,灵活选取坐标 Orthogonal decomposition is a high frequency of use in high school physics a method called orthogonal decomposition, is to force along two mutually perpendicular x-axis, y-axis decomposition, decomposition of the resultant force on the x-axis Fx = F1x + F2x + F3x + ..., the resultant force on the y-axis Fy = F1y + F2y + F3y + .... The advantage of doing so is to convert the vector operation to algebraic operation. When establishing the coordinate system, the principle of less decomposition force and easy decomposition force should be used as far as possible Do not decompose the unknown force or decompose the unknown force less. In some problems, choose the coordinates flexibly