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在现行教材测量滑动摩擦系数的实验中,要求木块在长木板或玻璃板上做匀速运动,学生往往不易掌握. 本文采用另一种实验程序,使用的器材廉价,容易操作,而且可让学生改变不同的参量进行测量。实验装置如图(a)和(b)所示。要用的器材有:一端装有定滑轮的长木板,长玻璃板,几个材料不同的小方块,细绳,几个重物(可用砝码),刻度
In the experiment of measuring the sliding friction coefficient in the current teaching materials, it is required that the wood block should be uniformly moved on a long board or glass plate, and the students are often not easy to master. This article adopts another experimental procedure, the equipment used is cheap, easy to operate, and allows students to Change different parameters to measure. The experimental setup is shown in (a) and (b). Equipment to be used: long board with fixed pulley at one end, long glass board, several small blocks with different materials, string, several weights (available weight), scale