(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

from one thing in Lagrange mechanics (general coordinates: [tex]\phi,\dot\phi,s,\dot{s}[/tex]) I got a equation system:

[tex]\begin{cases}R\ddot\phi\sin\phi+R\dot\phi^2\cos\phi+\ddot{s}=0\\ g\sin\phi+R\ddot\phi+\ddot{s}\sin\phi=0\end{cases}[/tex]

3. The attempt at a solution

Is it good idea to make a thing which is approximating a equations for little [tex]\phi[/tex] and do it like this [tex]\sin\phi\approx\phi,\quad\cos\phi\approx1[/tex]?

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# Homework Help: Second order differential equation Lagrange mechanics

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