“理想模型”既是物理学赖以建立的基本思想方法 ,也是物理学应用于解决实际问题的重要途径和方法 .但是物理模型是有限的 ,而客观事物是无限的 ,尤其对于中学物理教学而言 ,由于学生所学物理知识的局限和数学能力的制约 ,许多物理情景并不能直接抽象成学生熟悉的模型 .这就需 The “ideal model” is not only the basic ideological method that physics is built on, but also an important approach and method used by physics to solve practical problems. However, the physical model is limited and the objective things are infinite, especially for the physics teaching in middle schools. Due to limitations of students’ physics knowledge and limitations in mathematics ability, many physical scenarios cannot be abstracted directly into students’ familiar models.