4.6.Potential energy

Potential energy is energy due to the mutual arrangement of bodies and the nature of their interaction. Under appropriate conditions, it is possible to change the potential energy, due to which the work is done. To raise the body of mass m to a height need to do work against the forces of P:

,

minus sign before the integral, since the force P is directed opposite to the change in h.

Integrating this expression:

This energy will go on increasing the energy of the body-to-Earth closed system, i.e. numerically equal

Counting the surface of the earth get

This energy The body-to-earth system is the potential energy lifted to height h:

(4.11)