Gabriel Genellina wrote: > For what I can > remember of my first love (Physics): if you have a small ball > moving inside a spherical cup, it would be almost crazy to use > cartesian orthogonal coordinates and Newton's laws to solve it - > the "obvious" way would be to use spherical coordinates and the > Lagrangian formulation (or at least I hope so
Yep, that's right. > - surely knowledgeable people will find more "obviously" which is > the right way). No, this case is IMHO almost classical. Movement with planar constraints can be solved quite easy using Lagrange. > All classical mechanics formulations may be equivalent, but > in certain cases one is much more suited that the others. Or: Lagrange is the only obvious way to describe movement with constraints. Regards, Björn -- BOFH excuse #80: That's a great computer you have there; have you considered how it would work as a BSD machine? -- http://mail.python.org/mailman/listinfo/python-list
