Joule Unit
Joule = 1 Newton × 1 Meter
You may wonder what a “n-m” is, and it does look confusing. Work can be expressed in any force unit times any distance unit.
In other words, work can be described in units such as foot-pounds (ft-lbs) or kilogram-meters (kg-m). A foot-pound would mean using the force of one pound to move something one foot. Usually, however, work is described in joules.
A joule is approximately the same as 3/4 of a ft-lb. Precisely, a joule is the work done by moving a one kilogram object a distance of one meter. A joule is not only a unit of work, but it serves as a unit of energy also. It is used in all subjects dealing with energy, whether it be electrical, mechanical, thermal, etc. In the previous example, you and your friend did 450 joules of work.
