Practice Work, Power, And Energy (4) - Work, Power, and Energy

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9 questions

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3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
Define work in your own words.
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Consider a simple example involving force and movement.
Question 2.
What unit is used to measure power?
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Think about how power relates to doing work over time.
3Question 3.
What is the formula for calculating work?
- W = P * t
- W = F * d
- W = V * Q
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Think about how force and distance relate to work.
4Question 4.
Power is defined as the rate at which work is done. True or False?
- True
- False
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Think about the meaning behind what power represents.
Question 5.
A circuit has a voltage of 24 V and a total current flow of 3 A. Calculate both the power and work done if the current flows for 10 seconds.
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Calculate power first and then use it to find work.
Question 6.
An electric heater operates at 1500 W for 3 hours. Determine the total energy consumed in kilowatt-hours and the cost if the energy price is $0.12 per kWh.
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Remember to convert watts to kilowatts first!

5 more questions in this section. Enroll free to practise them all.