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在物理教学过程中,发现学生对下面两类问题较难掌握,而用假设法可以帮助学生顺利地解决有关问题。一、关于判别物体是否发生形变问题在判别两物体之间是否存在弹力作用这个问题时,学生们都知道弹力存在的判别条件: (1)两物体相互接触; (2)两物体发生弹性形变。条件(1)较易把握,对条件(2)很多学生感到棘手。
In the process of physics teaching, students find it difficult to grasp the following two types of problems. Using the hypothesis method can help students solve the problems smoothly. First, on the issue of whether or not to determine the deformation of the object In determining whether the existence of the elastic effect between the two objects, the students are aware of the existence of the elastic discriminant conditions: (1) two objects in contact with each other; (2) elastic deformation of the two objects. Condition (1) is easy to grasp, and it is difficult for many students in condition (2).