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In a physics term, power is the rate at which work takes place or energy is transmitted. It can also be defined as the amount of energy needed or used to complete an activity over a period of time. The SI unit for power is the the Watt or "W". Other non SI units include horsepower "HP", calories per hour, "cal/hr", and foot pounds per minute "ft-lbs/min". | =Definition= | ||
In a physics term, '''power''' is the rate at which work takes place or energy is transmitted. It can also be defined as the amount of [[energy]] needed or used to complete an activity over a period of time. | |||
=Units= | |||
The SI unit for power is the the Watt or "W". Other non SI units include: | |||
* horsepower "HP", | |||
* calories per hour, "cal/hr", and | |||
* foot pounds per minute "ft-lbs/min". | |||
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The equation for power is <math>P = W/t</math> where P is power, W is work and t is time. A second equation for power is <math>P = E/t</math> where E is energy and t is time. | The equation for power is <math>P = W/t</math> where P is power, W is work and t is time. A second equation for power is <math>P = E/t</math> where E is energy and t is time. | ||
[[Category:PH261]] | |||
[[Category:Energy]]] | [[Category:Energy]]] | ||
Revision as of 23:26, 17 October 2007
Definition
In a physics term, power is the rate at which work takes place or energy is transmitted. It can also be defined as the amount of energy needed or used to complete an activity over a period of time.
Units
The SI unit for power is the the Watt or "W". Other non SI units include:
- horsepower "HP",
- calories per hour, "cal/hr", and
- foot pounds per minute "ft-lbs/min".
Equation
The equation for power is where P is power, W is work and t is time. A second equation for power is where E is energy and t is time.]
