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    Preet.vijay1's Avatar
    Preet.vijay1 Posts: 1, Reputation: 1
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    #1

    Feb 27, 2012, 01:46 PM
    What is the work -energy theorem?
    What is the work-energy theorem?
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Feb 27, 2012, 02:01 PM
    I think what you are referreing to is a physical law (not really a theorem). The 1st law of thermodynamics states:

    Increase in internal energy of a system = heat supplied to the system - work performed by the system

    In physics they typically ignore heat, and so this becomes:

    Change in energy + work performed = 0.
    pratz.ami's Avatar
    pratz.ami Posts: 5, Reputation: 1
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    #3

    Feb 28, 2012, 04:34 AM

    The work energy theorem says that ''The work done by the net force acting on a body results change only in its kinetic energy. ''

    But if the resultant force is in vertically up direction it will surely change its potential energy too
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