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(高一物理)圆锥摆的极限

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hbghlyj posted 2019-12-30 18:29 |Read mode
在长为L的细绳下端拴一个质量为m的小物体,绳子上端固定,设法使小物体在水平圆周上角速度$\omega$旋转,绳与转轴之间的夹角为$\theta$,则\[mg\tan\theta=mL\sin\theta\omega^2\]\[\cos\theta=\frac g{L\omega^2}\]
当$\theta\to0$时,$\omega=\sqrt{\frac Lg}$,即$T=2\pi\sqrt{\frac gL}$,这是单摆的周期公式!
圆锥摆其实可以看成是单摆与匀速圆周运动的合成(这有助于分析问题,实际上是有差异的)。——百度百科
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