Abstract
It is shown that an oldest form of variational calculus of mechanics, the Maupertuis least action principle, can be used as a simple and powerful approach for the formulation of the variational principle for damped motions, allowing a simple derivation of the Lagrangian mechanics for any dissipative systems and an a connection of the optimization of energy dissipation to the least action principles. On this basis, it is shown that not all motions of classical mechanics obey the rule of least energy dissipation or follow the path of least resistance, and that the least action is equivalent to least dissipation for two kinds of motions : all stationary motions with constant velocity and all motions damped by Stokes drag.
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