Difference between revisions of "Power"
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===About Power=== | ===About Power=== | ||
| + | : The [[unit]] of [[power]] is the [[Watt]]. | ||
: [[Power]] is how quickly [[energy]] is [[Energy Transfer|transferred]] from one [[Energy Store|store]] into another. | : [[Power]] is how quickly [[energy]] is [[Energy Transfer|transferred]] from one [[Energy Store|store]] into another. | ||
: [[Energy Transfer]]ed is the same as [[Work Done]], so [[power]] is also the rate of [[Work Done|work done]]. | : [[Energy Transfer]]ed is the same as [[Work Done]], so [[power]] is also the rate of [[Work Done|work done]]. | ||
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Where: | Where: | ||
| − | : P = Power | + | |
| − | + | P = Power | |
| − | + | ||
| + | E = [[Energy Transfer]]red = W = [[Work Done]] | ||
| + | |||
| + | t = Time | ||
| + | |||
| + | ==Key Stage 4== | ||
| + | ===Meaning=== | ||
| + | [[Power]] is the rate of [[Energy Transfer]]/[[Work Done]]. | ||
| + | |||
| + | ===About Power=== | ||
| + | : The [[SI Unit]] of [[power]] is the [[watt]]. | ||
| + | |||
| + | ===Equations=== | ||
| + | :<math>Power = \frac{Work Done}{Time}</math> | ||
| + | :<math>P = \frac{W}{t}</math> | ||
| + | |||
| + | Where: | ||
| + | |||
| + | P = Power | ||
| + | |||
| + | E = [[Energy Transfer]]red = W = [[Work Done]] | ||
| + | |||
| + | t = Time | ||
| + | |||
| + | :<math>Power = Current |times PotentialDifference</math> | ||
| + | :<math>P = IV</math> | ||
| + | |||
| + | Where: | ||
| + | |||
| + | P = Power | ||
| + | |||
| + | I = [[Electrical Current|Current]] | ||
| + | |||
| + | V = [[Potential Difference]] | ||
Revision as of 16:22, 2 February 2019
Contents
Key Stage 3
Meaning
Power is the rate of Energy Transfer.
About Power
- The unit of power is the Watt.
- Power is how quickly energy is transferred from one store into another.
- Energy Transfered is the same as Work Done, so power is also the rate of work done.
Equation
\[Power = \frac{Energy Transferred}{Time}\] \[P = \frac{E}{t}\]
\[Power = \frac{Work Done}{Time}\] \[P = \frac{W}{t}\]
Where:
P = Power
E = Energy Transferred = W = Work Done
t = Time
Key Stage 4
Meaning
Power is the rate of Energy Transfer/Work Done.
About Power
Equations
\[Power = \frac{Work Done}{Time}\] \[P = \frac{W}{t}\]
Where:
P = Power
E = Energy Transferred = W = Work Done
t = Time
\[Power = Current |times PotentialDifference\] \[P = IV\]
Where:
P = Power
I = Current