Energy conversion and conservation

In a physical system some bodies may have kinetic energy, potential energy of one or more types, or various other forms of energy. The notion of is used mechanical energy to denote the sum of the kinetic and potential energies in the system:

$E = E_{C} + E_{P}$

During its evolution, the system can exchange energy with the external environment, energy can be redistributed between different parts of the system, and energy can be converted from one form to another, as provided by the following laws:

Energy conversion and conservation

Theorem of variation of kinetic energy

Variation of potential energy theorem

Theorem of variation of mechanical energy

The law of conservation of mechanical energy

The law of conservation of energy