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4.6.Potential energy

Lecture



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 4.6.Potential energy need to do work against the forces of P:

4.6.Potential energy ,

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

Integrating this expression:

4.6.Potential energy

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

4.6.Potential energy

Counting the surface of the earth 4.6.Potential energy get

4.6.Potential energy

This energy 4.6.Potential energy The body-to-earth system is the potential energy lifted to height h:

4.6.Potential energy (4.11)

See also


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Physical foundations of mechanics

Terms: Physical foundations of mechanics