Work and Energy
Work is closely related to energy. The conservation of energy states that the change in total internal energy of a system equals the added heat minus the work performed by the system (see the first law of thermodynamics),
Also, from Newton's second law for rigid bodies it can be shown that work on an object is equal to the change in kinetic energy of that object,
- .
The work of forces generated by a potential function is known as potential energy and the forces are said to be conservative. Therefore work on an object moving in a conservative force field is equal to minus the change of potential energy of the object,
This shows that work is the energy associated with the action of a force, and so has the physical dimensions and units of energy.
The work energy principle discussed here is identical in the case of Electrical work.
Read more about this topic: Work (physics)
Famous quotes containing the words work and, work and/or energy:
“If work and leisure are soon to be subordinated to this one utopian principle—absolute busyness—then utopia and melancholy will come to coincide: an age without conflict will dawn, perpetually busy—and without consciousness.”
—Günther Grass (b. 1927)
“Juggling produces both practical and psychological benefits.... A woman’s involvement in one role can enhance her functioning in another. Being a wife can make it easier to work outside the home. Being a mother can facilitate the activities and foster the skills of the efficient wife or of the effective worker. And employment outside the home can contribute in substantial, practical ways to how one works within the home, as a spouse and as a parent.”
—Faye J. Crosby (20th century)
“Viewed narrowly, all life is universal hunger and an expression of energy associated with it.”
—Mary Ritter Beard (1876–1958)