The work done by a force per unit of time. In practical problems, it is important to know not only the work done by the force, but also the time it takes to complete that work. That is why the concept of power is applied in mechanics to describe how fast work is done.The following unit conversions are available:Milliwatts、、Kilowatts、Megawatts、Microwatts、Watts、Horsepower、Picowatts