BRAINCAKEPower
Power is the rate of work done Power is measured in joules per second (Js-1) or watts (W) The rate of work done against gravity by a 70kg man climbing a 3.0m flight of stairs in 8.0 seconds is given by
Power = (mgΔh)/t
= (80 × 9.81 × 3.0)/8.0
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Key terms in this lesson
- work done
- The energy transferred when a force moves its point of application through a distance in the direction of the force.
More in Work, Energy and Power
- Work Done at and Angle to Motion
- Principle of Conservation of Energy
- Forms of Energy
- Kinetic Energy
- Gravitational Potential Energy
- Energy Transfer
- Power and Motion
- Efficiency
All 10 lessons in Work, Energy and Power · All OCR AS-level Physics topics