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高中物理力学部分中关于物体的合运动问题,大多数学生感到比较困难的就是速度的合成与分解,究竟哪个是“合速度”哪个是“分速度”不容易搞清楚.笔者在教学中通过对“绳子”模型的研究发现:如果能从运动的物体对绳子产生的效果来分析,这类问题就比较容易解决.下面就“绳子”模?
In the physical mechanics section of senior high school, the problem of the combined movement of objects, most students find it difficult to synthesize and decompose the speed. Which is the “speed” and which is the “speed” is not easy to figure out. The author passed it in teaching. The study of the “rope” model found that if one can analyze the effect of a moving object on a rope, this kind of problem is easier to solve. Here is the “rope” model.