28: Power
- Last updated
- Aug 8, 2024
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Simply put, power is the rate of change of energy (or work) with time:
In SI units, power is measured in units of watts (W), named for the Scottish engineer James Watt:
In CGS units, power is measured in units of statwatts:
The British engineering unit of power has no special name; it is simply a foot-pound per second (ft-lbf/sec).
Another common unit that is not part of the British engineering system is the horsepower (hp):
- Lawn mower:
- Smart car:
- Typical modern automobile engine: about
- 1967 Pontiac GTO “muscle car”:
- Semi truck (tractor):
- Modern farm tractor:
- Formula One engine used in a modern Indianapolis 500 race car:
or more - "Monster truck" (as seen at county fairs):
