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牛顿第二定律在力学乃至整个物理中占有重要的地位。通过这一课题的复习,既可巩固和加深对力、物体的平衡和变速运动的知识的理解,又可为下一步复习圆周运动、机械能、动量、电场、电磁感应等重点章打下较好的基础。下面,谈谈复习牛顿第二定律要注意的两个问题。 一、必须加深对牛顿第二定律的理解。牛顿第二定律是力学的重点内容,在总复习时,应精心设计,选编典型范例配合讲解,使同学们从如下几个方面加深对其表达式F=ma的正确理解。
Newton’s second law holds an important position in mechanics and even in the entire physics. Through the review of this topic, we can not only consolidate and deepen our understanding of the balance between force and object and the knowledge of variable speed movement, but also lay a good foundation for the review of circular motion, mechanical energy, momentum, electric field and electromagnetic induction. basis. Next, talk about two issues that we must pay attention to when reviewing Newton’s second law. First, we must deepen our understanding of Newton’s second law. Newton’s second law is the key content of mechanics. In the overall review, it should be carefully designed, selected and compiled typical examples and explanations, so that the students deepen their understanding of the expression F=ma from the following aspects.