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在物理教学中,摩擦力是3种基本性质力中最难判定的力,对其大小和方向的确定是学习的重难点。同时,对物体在各种运动状态下摩擦力分析的内容在历年高考题中都有所体现,是高考的必考内容之一。虽然学生在初中已经学习了摩擦力的概念,在生活中也接触到了大量的有关摩擦力的现象和问题,但学生对静摩擦力的认识却是不完整的,存在因思维定势而产生的错误认识,特别是对静摩擦力方向的认识有一定的困难。为此,笔者通过反复探索研究,设计制作了一款简易摩擦力演示器,克服了上述不足。
In physics teaching, the friction force is the most difficult force to determine the three kinds of basic force, and the determination of its size and direction is a difficult task to learn. At the same time, the object in a variety of sports state friction analysis of the contents of the college entrance examination in the calendar all have reflected, is the college entrance examination one of the necessary content. Although students have learned the concept of friction in junior high school and exposed a large number of phenomena and problems related to friction in their lives, the students’ understanding of static friction is incomplete and their mistakes in thinking Understanding, especially the understanding of the direction of static friction have some difficulties. To this end, the author through repeated exploration and research, designed and manufactured a simple friction demonstrator, to overcome the above shortcomings.