物理极值问题牵涉到在一定条件下寻求最佳结果,通常难度较大,技巧性较强.利用几何法求极值问题时,其特点是简便、直观,能把物体运动中较为复杂的极值问题,转化为简单的几何问题去解.利用几何中的圆求物理极值是高中物理中最常见的方法,本文就此方法进行总结,以就教于读者.一、 The problem of physical extremum involves finding the best result under certain conditions, which is usually more difficult and skillful. When using the geometric method to solve the problem of extreme value, it is characterized by simple, intuitive, and can be more complex in the movement of the object The value problem is transformed into a simple geometric problem to solve. Using the circle in geometry to find the physical extreme is the most common method in high school physics. This article summarizes this method to teach the reader.