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人教版高中《物理》第一册“运动的合成和分解”一节,课本上介绍的实验为蜡块在装满水的倒置的长玻璃管中的运动,笔者认为有以下不足之处:(1)口径合适,长约80 cm～100 cm 的玻璃管不易找到;(2)在玻璃管倒置过程中,蜡块已自动上升,人对蜡块的运动无法控制,即起始位置无法确定;(3)长玻璃管在使用中也不安全.为此,笔者自制了一套运动的合成和分解演示仪,现将制作及功能演示介绍如下,供同仁参考:
People’s PEP version of high school “Physics” first volume “synthesis and decomposition of movement ” section, the textbook experiments on the wax block in the water filled inverted long glass tube movement, I think the following deficiencies (2) In the glass tube inversion process, the wax block has automatically increased, people can not control the movement of the wax block, that is, the starting position Can not determine; (3) long glass tube in use is not safe.To this end, I made a self-made movement of the synthesis and decomposition of the demonstrator, now the production and functional demonstration is as follows, for colleagues reference: