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,
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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/or energy:
“Whoever is not in the possession of leisure can hardly be said to possess independence. They talk of the dignity of work. Bosh. True work is the necessity of poor humanity’s earthly condition. The dignity is in leisure. Besides, 99 hundredths of all the work done in the world is either foolish and unnecessary, or harmful and wicked.”
—Herman Melville (1819–1891)
“Parents find many different ways to work their way through the assertiveness of their two-year-olds, but seeing that assertiveness as positive energy being directed toward growth as a competent individual may open up some new possibilities.”
—Fred Rogers (20th century)