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在现行高中物理课本上册“简谐振动方程和周期公式”这节教材中有一个证明匀速圆周运动的投影是简谐振动的重要实验。如按教材图8—5来做这个实验不易做好:因为1.弹簧振子的周期不便调节;2.两球运动的周期很难一致;3.两球同时起步较难控制,为了做好这一实验我们做了一些改进,收到较好效果。简要介绍如下:用单摆代替弹簧振子。为减小摆球的阻尼选用比重较大的钢球。为使摆线能方便地调节到所需的长度上。我们在摆架上做了一个摆长的粗调和细调装置(见
In the present textbook of the textbook “Harmonic Vibration Equation and Periodic Formula” in the current textbook of high school physics, there is a demonstration that the projection of uniform circular motion is an important experiment of harmonic vibration. For example, according to Figure 8-5 of the textbook, this experiment is not easy to do: 1. Because the period of the spring oscillator is inconvenient to adjust; 2. The period of the two ball movement is difficult to be consistent; 3. The two balls start at the same time difficult to control, in order to do this In an experiment we made some improvements and received better results. Briefly introduce the following: Use a single pendulum instead of a spring oscillator. In order to reduce the damping of the pendulum ball, use a larger proportion of steel balls. In order to make the cycloid easily adjusted to the required length. We have made a lengthy coarse and fine adjustment device on the swing frame (see