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Praxis Middle School Science: Work, 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. Which one of the formulas best describes ''power''?

Question 2 2. In a moveable pulley, how is the object's weight distributed through the rope?

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

Question 4 4. Which of the following is NOT true about the work-energy theorem?

Question 5 5. Why does it take more work to stop a fast car than a slow one?

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Question 6 6. Why would a system have less energy than it originally started with?

Question 7 7. What does the law of conservation of energy state?

Question 8 8. To do twice as much work in the same amount of time, how much power is required?

Question 9 9. In the absence of friction, how much energy would be lost as a rollercoaster car goes down the first of several 'hills'?

Question 10 10. What does the law of conservation of energy state?

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Question 11 11. How does the input force compare to the output force for a fixed pulley?

Question 12 12. What does a moveable pulley do that a fixed pulley does not?

Question 13 13. What is the standard unit of power?

Question 14 14. Which best describes potential energy?

Question 15 15. Why is potential energy called stored energy?

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Question 16 16. Which best describes the work-energy theorem?

Question 17 17. Which of the following scenarios will most likely require MORE power?

Question 18 18. Which does not constitute a change in energy?

Question 19 19. How is it possible to have less input force but more output force?

Question 20 20. What is a system?

Praxis Middle School Science: Work, 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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