Name: Period: STUDY GUIDE - Work, Power, Energy Definition Matching: 1. kinetic energy A. energy of motion 2. potential energy measure of work power C. rate at which work is done 3. 4. D. force over a distance work E. stored energy 5. energy Formulas: Write the formulas and give the units for each. 6. Work 9. Power 7. Kinetic energy 10. Potential energy Abbreviations Matching: Match the word to the abbreviation and to measurement. 11. N A. Joule 13. energy 12. J B. Newton 14. force Concepts Short answer: 15. Describe potential energy. 16. Explain why a book on the top of a bookshelf has more potential energy than an ant on the top of a shoe. 17. Describe kinetic energy.18. Explain why a truck on the highway has more kinetic energy than a baby crawling on the oor. 19. Describe work. 20. Explain why more work is done by lifting a 200M box off the floor than sliding a 35N block 20cm on a table. 21. Describe power. 22. Explain why a person running up the stairs uses more power than someone walking up the same stairs. Practice Problems: 23. A pinecone with a mass of 2.0kg rolls off the edge of a roof that is 3.0m off the ground. a. What was the pinecone's potential energy on the roof before it rolled off? b. If the pinecone is falling with a velocity of 11.0 m/s, how much kinetic energy does it have while it's falling? d. It takes a squirrel 1.5N of force to push the pinecone 8m. How much work did it do? 24. A box of mass 4.9 kg is on the edge of a 2.0m high shelf. What is its potential energy? 25. If a 3kg ball is at the top of a 9.0m hill, what is its potential energy? 26. A 55,000 kg truck is rolling at 28.4 m/s. How much kinetic energy does it have? 27. How much kinetic energy is in a 5kg toy moving at 3.6 m/s? Energy Diagram: Label the points of maximum potential energy (PE) & kinetic energy (KE). 28. 29. O O 30. O O O O