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Lagrange constraint mechanics problem 
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#1
Oct2510, 08:23 PM

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#2
Oct2510, 08:47 PM

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[itex]\theta[/itex] is the angular position of an identified point on the smaller sphere, measured with respect to the line joining the centers of the two spheres, right? Note that not only does [itex]\theta[/itex] change with time, but so does the orientation of that joining line, so you need to take that into account as well. That's where the [tex]\dot\phi[/tex] comes from.



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