Based on the principle of symmetry, we propose a universal expression of the energy of physical system. If we accept a generalized coordinate as an argument, we come to potential energy; if we accept a generalized velocity as an argument, we come to kinetic co-energy. Here, like in the variational principle, the concept of kinetic energy does not work. The examples of application relate to electromagnetic fields, electromagnetic circuits, and mechanics of concentrated masses.
- A. Tchaban. Mathematical modeling of oscilated processes in electromechanical systems, Lviv, Ukraine: T. Soroka’s publishing house, 2007. (Ukrainian)
- V. Tchaban. Mathematical modeling in electrical engineering, Lviv, Ukraine: T. Soroka’s publishing house, 2010.
- D. White, H. Woodson. Electromechanical trans–formation of energy. Translated from English, Leningrad, Russia: Energiya, 1964.
- A. V. Netushil, K. M. Polivanov. Theory of elect–romagnetic field, Moscow, Russia: Gosenergoizdat, 1956.