The POWER of a machine depends on:

(a) how much energy it gives to the load

(b) how long it took to give it this energy

The more powerful a machine the less time it takes to convert a given amount of energy from one from to another

Power = work done/ time taken = energy converted/time taken

The units for power are joules /second or WATTS. 1 joule/second = 1 watt

Larger powers are measured in kW or MW.

1 kilowatt (kW) = 1000 W.

1 Megawatt (MW) = 1000 000 W