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在讲述共振时,课本当中往往会出现一个研究摆的共振的实验,而在实际的教学中我们演示这个实验时,发现并不能很理想地达到实验效果,为此很多人也想到了一些排除干扰突出主题的方法,如策动球的质量要远大于其它球的质量的做法。笔者经过反复实验,观察到了一些深层次的物理理论问题。一.实验现象笔者用一个做单摆用的钢球和两个玻璃弹子球,在改变横绳松紧程度时按图一装置进行实验,并记录了观察结果。
When we talk about resonance, we often find an experiment on the resonance of the textbook. However, when we demonstrate this experiment in the actual teaching, we find that the experiment can not be achieved satisfactorily. Therefore, many people think of some interferences Highlight the theme of the method, such as the quality of the ball is much larger than the other ball quality practice. After repeated experiments, the author observed some deep-seated problems of physics theory. An experimental phenomenon I used to do a pendulum with steel balls and two glass marbles ball, changing the tightness of the horizontal rope according to the Figure 1 device experiments, and recorded the observations.