Definition:SI/Energy/Joule

Definition
The joule is the SI unit of energy.

It is defined as being:


 * the energy transferred to (or work done on) a body when a force of $1$ newton acts on that body in the direction of the force's motion through a distance of $1$ metre
 * the energy dissipated as heat when an electric current of one ampere passes through a resistance of one ohm for one second.

Thus:
 * $1 \, \mathrm J = 1 \, \mathrm N \, \mathrm m$