Joule

Definition

The joule (symbol: J) is the SI unit of energy.

In terms of mechanics, 1 J is equivalent to the work done when a force of 1 N is applied to an object, causing it to move a distance of 1 m in the direction of the force.

In terms of electrical circuit theory, 1 J is equivalent to the energy dissipated as heart when a current of 1 A flows thorough a resistance of 1 $Ω$ for one second.

Definitions

\begin{array}{rcl} J & = & kg \cdot m^{2} \cdot s^{- 2} \\ = & N \cdot m \\ = & Pa \cdot m^{3} \\ = & W \cdot s \\ = & C \cdot V \end{array}

where

Symbol	Definition
$kg$	kilogram, the SI unit of mass.
$m$	meter, the SI unit of distance.
$s$	second, the SI unit of time.
$N$	newton, the SI unit of force.
$Pa$	pascal, the SI unit of pressure.
$W$	watt, the SI unit of power.
$C$	coulomb, the SI unit of electric charge.
$V$	volt, the SI unit of electric potential.