用图像描述物理规律是高中阶段常用的方法,物理规律用数学表达出来后实质上是个函数关系式,如果这个函数关系式中只有2个变量,就可用图像来描述物理规律,这样就将代数关系转化为几何关系,几何关系往往具有直观、形象、简明的特点. Using the image to describe the laws of physics is a commonly used method in high school. After the physical laws are expressed mathematically, it is essentially a functional relation. If there are only two variables in this functional relation, we can use images to describe the laws of physics, Into a geometric relationship, geometric relationships tend to have intuitive, image, concise characteristics.