1. Energy Study Guide

2. 1. What is energy? 2. What is the unit to measure energy? 3. How are energy, work, and power related? 4. Find the power of a machine that transfers 450 J of energy in 9 seconds. 5. What are the two basic kinds of energy? Define them. 6. What factors affect an object kinetic energy?

3. 7. A 1350 kg car travels at 12 m/s. What is its kinetic energy? 8. A 380-N girl walks down a flight of stairs so that she is 2.5 m below her starting level. What is the change in the girl’s gravitational potential energy. 9. What kind of energy is stored in a stretched rubber band. 10. How can you determine an object’s mechanical energy?

4. 11. What are some forms of energy associated with the particles that make up objects? 12. What kind of energy is stored in the nucleus of an atom? 13. What kind of energy is stored in the food we eat? 14. For each of the following, decide which forms of energy are present: walnut falls from a tree, a candle burns, a spring is stretched. 15. What is stated in the law of Conservation of Energy?

5. 16. Explain in a paragraph how energy and friction are related. Page 62 17. Why are energy and matter always conserved? Page 63 18. Describe the energy trans formations in juggling? Page 60 19. Define single and multiple transformations. Page 59 20. What energy transformation takes place when wood is burned?