One joule is the work done, or energy expended, by a
force of one
newton moving an object one meter along the direction of the force. This quantity is also denoted as a Newton-meter with the symbol N·m. In elementary units:
One joule is also:
The work required to move an
electric charge of one
coulomb through an electrical potential difference of one
volt; or one coulomb volt, with the symbol C·V.
The work done to produce power of one
watt continuously for one second; or one watt second (compare kilowatt-hour), with the symbol W·s.
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