Work is defined as the accomplishment of motion against the action of a force which tends to oppose the motion. The SI unit for work is joule represented with J. The joule is defined as the work done (or energy required) in moving an object through a distance of one metre against an opposing force of one Newton.
Energy
Energy is defined as the ability to do work. Work is performed whenever energy is converted from one form to another. The joule is the SI unit of electrical energy just as work. One joule of electrical energy is the energy required to move one coulomb of electric charge through a potential difference of one volt.
Power
Power is the rate of doing work. The symbol for power is P. The Watt is the SI unit of power and it is represented with a symbol W. One Watt is the rate of doing work when one joule of work is done in one second.
