* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Energy Test Study Guide
Dark energy wikipedia , lookup
Photoelectric effect wikipedia , lookup
William Flynn Martin wikipedia , lookup
Energy storage wikipedia , lookup
Open energy system models wikipedia , lookup
Work (physics) wikipedia , lookup
100% renewable energy wikipedia , lookup
Energy subsidies wikipedia , lookup
Low-Income Home Energy Assistance Program wikipedia , lookup
Zero-energy building wikipedia , lookup
Public schemes for energy efficient refurbishment wikipedia , lookup
Low-carbon economy wikipedia , lookup
World energy consumption wikipedia , lookup
Alternative energy wikipedia , lookup
Energy Charter Treaty wikipedia , lookup
Energy harvesting wikipedia , lookup
International Energy Agency wikipedia , lookup
Energy policy of the United Kingdom wikipedia , lookup
Potential energy wikipedia , lookup
Energy returned on energy invested wikipedia , lookup
Distributed generation wikipedia , lookup
Life-cycle greenhouse-gas emissions of energy sources wikipedia , lookup
Energy policy of Finland wikipedia , lookup
Energy efficiency in transport wikipedia , lookup
Energy in the United Kingdom wikipedia , lookup
Internal energy wikipedia , lookup
Negawatt power wikipedia , lookup
Regenerative brake wikipedia , lookup
Energy policy of the European Union wikipedia , lookup
United States energy law wikipedia , lookup
Energy efficiency in British housing wikipedia , lookup
Energy applications of nanotechnology wikipedia , lookup
Energy Independence and Security Act of 2007 wikipedia , lookup
Energy Test: Study Guide (Applied Physics) Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. When a car’s speed triples, its kinetic energy a. remains the same. b. triples. c. increases by four times. d. increases by nine times. ____ 2. How much farther will a car traveling at 100 km/s skid than the same car traveling at 50 km/s? a. Half as far. b. The same distance. c. Twice as far. d. Four times as far. ____ 3. An object at rest may have a. energy. b. speed. c. velocity. d. momentum. ____ 4. Energy is changed from one form to another with no net loss or gain. a. Sometimes true b. Always false c. Always true ____ 5. A ball is thrown into the air with 100 J of kinetic energy, which is transformed to gravitational potential energy at the top of its trajectory. When it returns to its original level after encountering air resistance, its kinetic energy is a. 100 J. b. more than 100 J. c. less than 100 J. d. Not enough information given. ____ 6. An object that has kinetic energy must be a. at rest. b. falling. c. moving. d. elevated. ____ 7. Which has greater kinetic energy, a car traveling at 30 km/h or a half-as-massive car traveling at 60 km/h? a. The 60 km/h car b. Both have the same kinetic energy. c. The 30 km/h car ____ 8. An arrow in a bow has 70 J of potential energy. Assuming no loss of energy to heat, how much kinetic energy will it have after it has been shot? a. 0 J b. 35 J c. 50 J d. 70 J Energy Test: Study Guide (Applied Physics) ____ 9. As a pendulum swings back and forth a. at the end points of its swing, its energy is all potential. b. kinetic energy is transformed into potential energy. c. potential energy is transformed into kinetic energy. d. all of the above ____ 10. Suppose a moving car has 3000 J of kinetic energy. If the car's speed doubles, how much kinetic energy will it then have? a. 3000 J b. 1500 J c. 1000 J d. 12,000 J ____ 11. Kinetic energy of an object is equal to a. its mass multiplied by its acceleration squared. b. one half the product of its mass times its speed squared. c. its mass multiplied by its speed. d. one half the product of its mass times its speed. ____ 12. A 60-N object moves at 1 m/s. Its kinetic energy is a. 1 J. b. 3 J. c. 60 J. d. more than 60 J. ____ 13. The amount of potential energy possessed by an elevated object is equal to a. the power used to lift it. b. the distance it is lifted. c. the force needed to lift it. d. the work done in lifting it. ____ 14. Rockets are launched from an airplane in the forward direction of motion. The kinetic energy of the airplane will be a. unchanged. b. increased. c. decreased. ____ 15. Potential energy is the energy an object has because of its a. density. b. size. c. location. d. speed. Energy Test: Study Guide (Applied Physics) _______16. TRUE / FALSE: Kinetic energy is directly proportional to objects speed. ______17. True/False: Work is the transfer of energy that results from applying a force over a distance ______18. Geothermal energy comes from A. The Sun B. The Earth’s underground water reservoirs C. Nuclear fuel rods D. Fossil fuels ______19. TRUE / FALSE: An object has more kinetic energy as it is raised it to greater and greater heights. ______20. TRUE / FALSE: Energy that is stored in readiness is called potential energy ______21. If the mass of an object is doubled, it will A. Double its potential energy B. Halve its potential energy ______22. C. Quadruple its potential energy D. None of these are correct TRUE / FALSE: If you want to give an object more kinetic energy, you should do more work on the object. _______23. The unit for energy is the A. Volt B. Kilogram C. Joule D. Ampere ______24. Mechanical energy is defined as A. The energy possessed by an automobile B. Kinetic energy C. Potential energy D. Both B & C are correct _______25. TRUE / FALSE: Energy can be created and destroyed Energy Test: Study Guide (Applied Physics) Classify the following as a type of potential energy or kinetic energy (use the letters K or P) 1. A bicyclist pedaling up a hill _____ 2. An archer with his bow drawn 3. A volleyball player spiking a ball _____ 4. A baseball thrown to second base _____ 5. The chemical bonds in sugar _____ 6. The wind blowing through your hair _____ 7. Walking down the street _____ 8. Sitting in the top of a tree _____ 9. A bowling ball rolling down the alley _____ 10. A bowling ball sitting on the rack _____ _____ What examples can you find in your home that are examples of kinetic and potential energy (name two for each type of energy)? 11. Kinetic: __________________________________________________________________________ 12. Kinetic: __________________________________________________________________________ 13. Potential: _________________________________________________________________________ 14. Potential: _________________________________________________________________________ Energy Test: Study Guide (Applied Physics) Solve the following word problems using the kinetic and potential energy formulas (Be sure to show your work!) 15. Determine the kinetic energy of a 1000-kg roller coaster car that is moving with a speed of 20.0 m/s. 16. If the roller coaster car in the above problem were moving with twice the speed, then what would be its new kinetic ener 17. Missy Diwater, the former platform diver for the Ringling Brother's Circus had a kinetic energy of 15,000 J just prior to hitting the bucket of water. If Missy's mass is 50 kg, then what is her speed? 18. A cart is loaded with a brick and pulled at constant speed along an inclined plane to the height of a seat-top. If the mass o the loaded cart is 3.0 kg and the height of the seat top is 0.45 meters, then what is the potential energy of the loaded cart at t height of the seat-top? 19. A 75-kg refrigerator is located on the 70th floor of a skyscraper (300 meters above the ground) What is the potential ener of the refrigerator? 20. The potential energy of a 40-kg cannon ball is 14000 J. How high was the cannon ball to have this much potential energy