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一、总的分析 1.牛顿三定律在中学物理中的地位这一章在力学以至整个物理中占有重要的地位,它是经典力学的基础,如动量守恒定律、机械能守恒定律都是建立在这个基础上的,它也是进一步学习热学、电学和其他有关学科所必须掌握的内容。因而,本章是全书的重点教材,在教学中应充分重视它。 2.牛顿第一定律 (1) 要讲清的几个概念: ①惯性:这是高中学生接触到的新概念。光讲出惯性的定义,是很不够的,必须在给出定义的基础上强调三点:一是,惯性是物体固有的属性,它与物体受不受外力作用无关;二是,惯性是任何物体都有的,因此带有普遍的意义;三是,物体不管处在什么状态 (运动的或静止的) 都具有惯性,决不能认为只是在运动状态发生变化时,物体才具有惯性。
I. General Analysis 1. The Newton’s Law of Three Laws in Middle School Physics This chapter occupies an important position in mechanics and even the whole physics. It is the foundation of classical mechanics. For example, the law of conservation of momentum and the law of conservation of mechanical energy are all based on this Based on it, it is also necessary to further study thermal, electrical and other relevant disciplines. Therefore, this chapter is the focus of the book, teaching, should give full attention to it. 2. Newton’s First Law (1) To clarify several concepts: ① inertia: This is a high school students come into contact with the new concept. Light to speak of the definition of inertia, is not enough, must be given on the basis of the definition to emphasize three points: First, inertia is the inherent property of the object, it is not subject to objects subject to external forces has nothing to do; Second, the inertia is any Objects have their own meaning, so with a universal meaning; Third, the object regardless of what state (sports or static) have inertia, must not be considered only in the changing state of movement, the object has inertia.