摩擦力的计算是高中物理教学的重点和难点,也是历年高考的热点.在批改同学们的作业、试卷和解答同学们提出的疑难问题中,笔者认为同学们没有准确理解摩擦力计算的两个核心问题:(1)摩擦力的产生条件,特别是混淆了“运动”与“相对运动”这两个概念;(2)区分滑动摩擦力和静摩擦力的意识不强.现分别举例说明,供大家学习时参考. Calculation of friction is the focus and difficulty of high school physics teaching, but also the hot spot of college entrance examination over the years.While correcting the students’ homework, papers and answers to the difficult questions raised by students, I think the students did not accurately understand the friction calculation of two The core issues are: (1) the conditions for the generation of friction, especially the confusion between the two concepts “movement” and “relative movement”; (2) the distinction between sliding friction and static friction is not strong. For example, for everyone to learn reference.