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力学中,分析物体的运动过程是个关键,复习时若能着力于此,则学生分析问题、解决问题的能力就会有较大的提高。那么,怎样才能抓好这个关键呢?我认为应注意以下几个问题:一、要突出描述物体运动状态的物理量学生已学习了不少描述物体机械运动的物理量,在复习中必须使学生深刻理解:在这众多的量中,哪几个物理量是描述一个作机械运动的物体在某一瞬间、或某一位置的运动状态的,弄清这些状态量的物理意义,了解这些量的联系和区别。
In mechanics, analyzing the movement process of an object is a key. If we can focus on this during the review, students’ ability to analyze problems and solve problems will be greatly improved. So, how can we grasp this key? I think we should pay attention to the following issues: First, we must highlight the physical quantities that describe the motion of objects. Students have learned a lot of physical quantities that describe the mechanical movement of objects. Students must be able to understand the physical quantities during the review. : Among these numerous quantities, which physical quantities describe the motion state of an object that is used for mechanical motion at a certain instant or in a certain position, the physical meaning of these state quantities is known, and the connection and difference between these quantities are known. .