Physics › Section E · Work, energy, and power › Topic E.6
Power
Walking up the stairs and sprinting up them take the same work, but sprinting does it faster. Power measures how quickly energy is transferred, and it is what engines, muscles and electricity bills are really rated by.
In this topic
- How fast, not how much
- Defining power
- Worked example: up the stairs
- Power, force and velocity
- Worked example: a car at motorway speed
- The horsepower
- The kilowatt-hour
- Worked example: a space heater
- A sense of scale
- Common mistakes to avoid
- Key takeaways
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