FHSST Physics/Work and Energy/Summary

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The Free High School Science Texts: A Textbook for High School Students Studying Physics
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Work and Energy
Definition - Work - Energy - Mechanical Energy and Energy Conservation - Important Quantities, Equations, and Concepts - Sources

Summary of Important Quantities, Equations and Concepts[edit]

Table 7.1: Summary of the symbols and units of the quantities used in Energy
Units
Quantity Symbol Unit S.I. Units Direction
Work W J N.m orkg.m^2.s^{-2} --
Kinetic Energy EK J N.m orkg.m^2.s^{-2} --
Potential Energy EP J N.m orkg.m^2.s^{-2} --
Mechanical Energy U J N.m orkg.m^2.s^{-2} --


Principle of Conservation of Energy: Energy is never created nor destroyed, but merely transformed from one form to another.

Conservation of Mechanical Energy: In the absence of friction, the total mechanical energy of an object is conserved.