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:
“The economic dependence of woman and her apparently indestructible illusion that marriage will release her from loneliness and work and worry are potent factors in immunizing her from common sense in dealing with men at work.”
—Mary Barnett Gilson (1877?)
“Hard work. Well, thats all right for people who dont know how to do anything else. Its all right for people who arent lucky. But once youre lucky, you dont have to work for other people. You make them work for you.”
—Dan Totheroh (18951976)
“Violence among young people ... is an aspect of their desire to create. They dont know how to use their energy creatively so they do the opposite and destroy.”
—Anthony Burgess (b. 1917)