A more powerful vehicle completes a journey in a shorter time than a less powerful one due to its ability to transfer energy more efficiently, resulting in faster movement.

A stronger person completing certain work faster exemplifies power because power measures the speed of work done, showing how fast or slow work is accomplished.

Power is important in classifying machines because it determines how quickly they can complete tasks or journeys.

Power is defined as the rate of doing work or the rate of transfer of energy.

The fundamental concept used to measure the speed of work done by machines is power.