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Physics I
Spring Potential Energy and Hooke’s Law
Description
Spring potential energy is a key idea in physics. It is the energy stored when a spring is stretched or compressed from its relaxed state. Because the spring can do work on an object, that stored energy is an important example of potential energy.
Potential energy is the energy linked to forces t...
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Transcript
胡克定律和简谐运动现象有助于理解弹性物体相关的物理原理。
胡克定律表明,为了使弹性物体(例如弹弓)发生形变,必须施加一个力来克服该物体产生的恢复力。此恢复力是物体的弹性常数 k 与位移 ?y 的乘积,但方向与位移或所施加的力相反。
显然,弹性物体储存了具有做功能力的势能。当功完成后,弹性物体会发生振荡。如果我们绘制该物体位置随时间变化的振荡行为图像,则该图形表示简谐运动。
在本视频中,我们将演示一个利用弹簧和重物来验证胡克定律和简谐运动原理的实验。
在演示弹簧如何运动之前,让我们回顾一下其振荡背后的物理概念。设想对弹簧施加一个力(例如一个重物),该力会使弹簧从初始的未变形位置被拉伸,直到弹簧产生一个方向相反的恢复力,最终与外力平衡,从而建...
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