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  • 24.2: Фізичний маятник
    https://ukrayinska.libretexts.org/%D1%84%D1%96%D0%B7%D0%B8%D0%BA%D0%B8/%D0%9A%D0%BB%D0%B0%D1%81%D0%B8%D1%87%D0%BD%D0%B0_%D0%BC%D0%B5%D1%85%D0%B0%D0%BD%D1%96%D0%BA%D0%B0/%D0%9A%D0%BB%D0%B0%D1%81%D0%B8%D1%87%D0%BD%D0%B0_%D0%BC%D0%B5%D1%85%D0%B0%D0%BD%D1%96%D0%BA%D0%B0_(Dourmashkin)/24%3A_%D0%A4%D1%96%D0%B7%D0%B8%D1%87%D0%BD%D1%96_%D0%BC%D0%B0%D1%8F%D1%82%D0%BD%D0%B8%D0%BA%D0%B8/24.02%3A_%D0%A4%D1%96%D0%B7%D0%B8%D1%87%D0%BD%D0%B8%D0%B9_%D0%BC%D0%B0%D1%8F%D1%82%D0%BD%D0%B8%D0%BA
    \[\vec{\tau}_{S}=\overrightarrow{\mathbf{r}}_{S, \mathrm{cm}} \times m \overrightarrow{\mathrm{g}}=l_{\mathrm{cm}} \hat{\mathbf{r}} \times m g(\cos \theta \hat{\mathbf{r}}-\sin \theta \hat{\boldsymbol...→τS=→rS,cm×m→g=lcmˆr×mg(cosθˆr−sinθˆθ)=−lcmmgsinθˆk ωz(t)=dθdt(t)=−ω0Asin(ω0t)+ω0Bcos(ω0t)