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初中阶段学生接触了常见的几种力,分别是重力、摩擦力、弹力与浮力等等。学生在平时的学习中常常遇到力学问题,解决这些问题的关键是对物体进行受力分析。而对物体进行受力分析尤其是物体同时受到几个力作用的分析,学生往往感觉很困难,对受力分析没有好的方法而导致问题的错误解答。受力分析既是学生学习的难点,也是教师教学的重点。下面笔者结合本人的教学实际,浅谈初中受力分析教学的几点体会。
In the junior high school, students touched several kinds of common forces: gravity, friction, elasticity and buoyancy. Students often encounter mechanical problems in their daily learning. The key to solving these problems is to analyze the objects. While stress analysis of objects, especially when the object is subjected to several forces at the same time, students often feel very difficult, and there is no good way to analyze the force and result in wrong answers to the problem. Stress analysis is not only a difficult point for students to learn, but also a key for teachers’ teaching. The following author combines my teaching practice, talking about a few experiences of force analysis teaching in junior high school.