当物体受到跟位移成线性关系的回复力的作用时,将做简谐运动．有些振动从形式上看并不像我们所熟悉的“弹簧振子”,却具备做简谐运动的条件,所以简谐运动的规律对它们同样适用．例1 如图1所示,两个质量均为m的物体A、B用劲度系数为k的弹簧连接后,竖直放到水平地面上．现用竖直向上的力F作用在A When the object is subjected to a restoring force that is linearly related to the displacement, a simple harmonic motion will be performed. Some forms of vibration do not look like the “spring oscillators” we are familiar with, but they have the conditions for simple harmonic motions, so the laws of simple harmonic motion apply equally to them. Example 1 As shown in Fig. 1, two objects A and B with mass m are connected by a spring with a stiffness coefficient of k, and then placed vertically on a level ground. The vertical upward force F now acts on A