惯性是九年级物理第十二章第五节《牛顿第一定律》中一个重要的教学内容(知识点),是运动和力的关系知识中一个重要的概念,又与实践知识紧密相联。明确惯性概念,理解惯性现象,既是学习运动和力的关系乃至整个力学的基础,又是培养学生理论联系实际的重要 Inertia is an important teaching content (knowledge) in Chapter 9 of the ninth grade physics chapter “Newton’s First Law”. It is an important concept in the knowledge of the relationship between exercise and force, and is closely linked with practical knowledge. The definition of inertia and the understanding of inertia are both the basis for learning the relationship between movement and force and the entire mechanics. It is also important for cultivating students’ theory and practice.