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Unformatted text preview: yang (jy6223) Work and Energy mostarshed (338A1) 1 This printout should have 39 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. 001 10.0 points Mechanical energy is associated with 1. motion. 2. chemical reactions. 3. the nuclei of atoms. 4. the motion of electric charges. 002 10.0 points Potential energy and kinetic energy are forms of what kind of energy? 1. heat 2. mechanical 3. chemical 4. nuclear 5. electromagnetic 003 10.0 points A Joule is a measure of 1. energy. 2. volume. 3. density. 4. distance. 5. momentum. 004 10.0 points Two objects of same material are travelling near you. Object A is a 1 . 4 kg mass traveling 12 . 8 m / s; object B is a 2 kg mass traveling 5 m / s. Which object would make you feel worse if you are hit by it? 1. Unable to determine 2. the same 3. A 4. B 005 10.0 points Which of the following is the best example of kinetic energy? 1. a loaded gun 2. a calculator battery 3. boulder dam 4. a strawberry shortcake 5. a television set 6. a tank of gasoline 7. a tornado 8. a stick of dynamite 9. a Jolt Cola 10. a piece of chewing gum 006 10.0 points A moving car has kinetic energy. If it speeds up until it is going four times faster than before, how much kinetic energy does it have in comparison? 1. Sixteen times larger 2. Four times larger 3. Sixteen times smaller 4. Four times smaller 5. The same yang (jy6223) Work and Energy mostarshed (338A1) 2 6. The mass is needed. 007 10.0 points Lee pushes horizontally with a force of 71 N on a 37 kg mass for 20 m across a floor. Calculate the amount of work Lee did. Answer in units of J. 008 10.0 points A man cleaning his apartment pushes a vac uum cleaner with a force of magnitude 76 . 3 N. The force makes an angle of 43 . 9 with the hor izontal floor. The vacuum cleaner is pushed 3 . 03 m to the right along the floor. Calculate the work done by the 76 . 3 N force. Answer in units of J. 009 (part 1 of 4) 10.0 points A block of mass 3 . 26 kg is pushed 1 . 4 m along a frictionless horizontal table by a constant 16 N force directed 30 below the horizontal. 3 . 26 kg = 0 1 6 N 3 Find the work done by the applied force. Answer in units of J. 010 (part 2 of 4) 10.0 points Find the work done by the normal force ex erted by the table....
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 Spring '11
 Mostarshed
 Physics, Energy, Work

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