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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. 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 2 2. 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 3 3. Elastic potential energy is the energy an object has in it due to being what?

Question 4 4. Which of the following is the formula for elastic potential energy?

Question 5 5. If 1 Btu = 252 cal, how many Calories are in 10 Btu?

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Question 6 6. If 1 cal = 4.186 J, how many joules is 10,000 calories?

Question 7 7. If you cook something in your 2,000 W microwave for 2 minutes, how many kWh did it use?

Question 8 8. A Btu is the amount of heat needed to ___the temperature of ___ of water by ___.

Question 9 9. What is the standard unit of power?

Question 10 10. To do twice as much work in the same amount of time, how much power is required?

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Question 11 11. Which of the following scenarios requires more power?

Question 12 12. How much power is required to do 100 J of work in 10 s?

Question 13 13. 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 14 14. To which of the following variables is kinetic energy proportional?

Question 15 15. Different types of energy can be categorized as either kinetic or potential.

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Question 16 16. Which of the following is an example of potential energy and not kinetic energy?

Question 17 17. How do we know that gravitational potential energy exists?

Question 18 18. 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 19 19. Which of the following objects has the most gravitational potential energy?

Question 20 20. If a car is rolling naturally downhill without the engine running, what energy transfer is happening?

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Question 21 21. Which of the following is the best definition for energy?

Question 22 22. Which of the following is a property of energy?

Question 23 23. Which of the following is an example of mechanical energy?

Question 24 24. Which of the following is a common unit that is used to measure energy?

Question 25 25. Why is Hooke's law important for finding elastic potential energy?

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Question 26 26. Which of the following conversion factors is correct?

Question 27 27. Which best describes 'power'?

Question 28 28. A bike resting at the top of a hill would be an example of what type of energy?

Question 29 29. 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?

Question 30 30. Which of the following types of energy does the sun use to heat up our atmosphere?

System Energy & Power Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next question. You can skip questions if you would like and come back to them later with the "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. You will lose your work if you close or refresh this page. Good luck!

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