“静摩擦力”是高中物理必修1中的一个知识内容,但却贯穿整个高中物理教学之中,属于力学的一大难点,究其原因为什么学生在学习过程中会难以理解,笔者认为主要在于静摩擦力发生在彼此相对静止的物体间,其存在、方向以及大小都与相对运动趋势相关,因此具有较强的隐蔽性.“隐性知识”如何显性化呢?这是实现难点突破的关键,笔者在实际教学中,教师基于学生的体验,设计了一系列有联系的活动引导学生突破这一难点,现将笔者的做法与大家一起分享. “Static friction ” is a knowledge content of high school physics compulsory 1, but it runs through the entire high school physics teaching, which is a major difficulty in mechanics. The reason is why students will find it hard to understand during the learning process. Because static friction occurs between objects that are relatively stationary relative to each other, their existence, direction and size are all related to the relative movement tendency, so they have strong concealment. How does tacit knowledge manifest itself? Breakthrough in the key, the author in the actual teaching, teachers based on the experience of students, designed a series of linked activities to guide students to break through this difficulty, now the author’s approach to share with everyone.