力的概念是本节课教学的重点。在教学过程中,从很多不同侧面均可以用不同的活动场景来启发引导学生参与到学习活动中来,以达到不断击破各个教学重难点的目的。 The concept of force is the focus of this lesson teaching. In the process of teaching, from different aspects, different activities can be used to inspire and guide students to participate in learning activities so as to achieve the purpose of constantly breaking through various teaching and learning difficulties.