摩擦力是高中力学教学的难点和重点之一 .正确认识摩擦力 ,对学生学习后面的知识有着至关重要的作用 ,而且摩擦力的学习历来也是学生感到头疼的问题 .教师在教学中一定要讲清、讲透它 ,从而使学生顺利逾越“摩擦力”这个横在学生面前的“鸿沟”.摩擦力是相互接触的物体做相对运 Friction is one of the difficulties and focuses of the teaching of high school mechanics. Correct understanding of friction is of crucial importance to students’ learning of the knowledge behind them, and friction learning has always been a problem for students. Teachers must be in teaching. To explain and explain it thoroughly, students will be able to successfully overcome the “gap” which is the “gap” in front of students. Friction is the relative movement of objects in contact with each other.