System Energy & Power Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. What is the standard unit of power?

Question 2 2. Which of the following scenarios will most likely require MORE power?

Question 3 3. How much power is required to do 100 J of work in 10 s?

Question 4 4. To do twice as much work in the same amount of time, how much power is required?

Question 5 5. Elastic potential energy is the energy an object has in it due to being what?

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Question 6 6. To find the formula for elastic potential energy of a spring we need to know the spring constant and the displacement of the spring. What exactly do we mean by displacement of the spring?

Question 7 7. Both the equations for Hooke's law, and elastic potential energy have a constant called the spring constant in them. What is the spring constant?

Question 8 8. Why is Hooke's law important for finding elastic potential energy?

Question 9 9. Which of the following is an example of potential energy and not kinetic energy?

Question 10 10. A bike resting at the top of a hill would be an example of what type of energy?

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Question 11 11. Consider a ball at the end of a string. If the ball is swinging back and forth, at what point in the swing would the ball have the most potential energy?

Question 12 12. Different types of energy can be categorized as either kinetic or potential.

Question 13 13. If a car is rolling naturally downhill without the engine running, what energy transfer is happening?

Question 14 14. If all of the objects have around the same mass, which of the following objects has the most gravitational potential energy?

Question 15 15. A 10 kg bowling ball is lifted from the ground to a height of 1 meter. Assuming the bowling alley is on Earth, how much gravitational potential energy does it now have?

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Question 16 16. How do we know that gravitational potential energy exists?

Question 17 17. Which of the following is a property of energy?

Question 18 18. Which of the following is the best definition for energy?

Question 19 19. Which of the following is an example of mechanical energy?

Question 20 20. Which of the following is a common unit that is used to measure energy?

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Question 21 21. A Btu is the amount of heat needed to ___the temperature of ___ of water by ___.

Question 22 22. If 1 Btu = 252 cal, how many Calories are in 10 Btu?

Question 23 23. If you cook something in your 2,000 W microwave for 2 hours, how many kWh did it use?

Question 24 24. If 1 cal = 4.186 J, how many joules is 10,000 calories?

Question 25 25. Which one of the formulas best describes ''power''?

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Question 26 26. Which of the following is the formula for elastic potential energy?

Question 27 27. To which of the following variables is kinetic energy proportional?

Question 28 28. You lift a 3kg dumbbell from the ground until it is above your head, at a height of 1.5 meters. How much energy did you use in the process? (Assume that you're not a space alien, and your gym is on Earth.)

Question 29 29. Which of the following types of energy does the sun use to heat up our atmosphere?

Question 30 30. Which of the following conversion factors is correct?

System Energy & Power Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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