在现行的高、初中物理教材和实际问题中都涉及摩擦力的教与学问题 ,而摩擦力又是一个变化多端又难以理解和掌握的力 .在课堂上要弄清楚摩擦力的一系列问题 ,必须借助有关的演示实验 ,但实验室却没有现成的仪器 .为了解决实际教学问题 ,笔者在反复实验的基础上 ,设计组装了一套 In the current high school and junior high school physics textbooks and practical problems, the problems of frictional teaching and learning are involved. The friction is also a force that is varied and difficult to understand and master. It is necessary to clarify the problems of friction in the classroom. , must rely on the relevant demonstration experiments, but the laboratory does not have ready-made instruments. In order to solve practical teaching problems, the author designed and assembled a set of experiments based on repeated experiments.