The Watt commonly indicated by the sign 'W' is the derived unit of power in the field of physics.
In the International System of Units (SI), a watt is a unit of power equal to one joule of work accomplished per second.
The Watt can be used to calculate the rate during which energy is transported. James Watt, a Scottish inventor, and chemist is the name of the SI unit of power.
When an opposition force of one Newton is applied to an object and its velocity is kept constant at one meter per second, the rate of work done is said to be one watt.