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2 cards from this section. Quick, good the night before a test.
Define power in your own words.
Think about how quickly work is being done.
What is the SI unit of power?
Remember, a watt is also related to joules.
What is the definition of power?
Think of work done over time.
How many watts are in one horsepower?
Recall the conversion factor between horsepower and watts.
A car uses 200 W of power to maintain a steady speed. How much energy does it use in 15 minutes?
Get the results using the power formula multiplied by time.
If a generator produces power at a rate of 5000 watts and operates for 4 hours, how much energy does it produce in kilowatt-hours?
Use the conversion from watts to kilowatts in the calculation.
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