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解决物理问题的方法多种多样,分割法是诸多方法中的一枝奇葩,笔者在此谈谈自己在初中物理教学中应用分割法的体会。一.用分割法阐明物理规律,能起“画龙点睛”的作用例如,判断滑轮组提升物体时拉力的大小,用初二课本上总结的规律进行判断并不直观,差生不易掌握。若用分割法“将定滑轮与动滑轮分割开来,数出跟动滑轮直接相接触的细绳根数n,则拉力即为重物和动滑轮总重力的1/n”。这种判断方法大部分学生都能掌握,并能熟练运用。
There are many ways to solve physical problems. The division method is a wonderful thing in many methods. The author here talks about his experience in applying the segmentation method in junior high school physics teaching. One. Using the segmentation method to clarify the physical laws, can play a “finishing touch” role. For example, to determine the pull of the pulley group to enhance the size of the object, using the laws of the second grade textbook to judge is not intuitive, poor students difficult to grasp. If the dividing method is used to separate the fixed pulley from the movable pulley and count the number of the string that is directly in contact with the moving pulley, then the pulling force is 1/n of the total weight of the weight and the moving pulley. This method of judgment can be mastered by most students and can be used skillfully.