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lesson for elementary school, middle school and high school.
What is mechanical energy ?
conversion of potential energy into kinetic energy for a falling object
indicates a link between these two forms of energy. This link has led
to define a new kind of energy: mechanical energy.
Several symbols can be used: sometimes ME, TME or U
kinds of energy, mechanical energy can be expressed in joule.
mechanical energy is the sum of kinetic energy and potential energy
Mechanical energy = kinetic energy + potential energy
ME = KE + PE
Conservation of mechanical energy
If an object
does not exchange energy with another object, its mechanical energy
mechanical energy does not vary, it implies that every change of
kinetic energy is simultaneously accompained by the opposite change of
potential energy ( and reciprocally ).
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