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Physics Quiz ENERGY Each question is multiple choice. Select the best response to the question by pressing the button to the left of your choice. If your answer is correct, you will hear an applause. Use the forward and backward buttons at the lower corner of the slides to advance questions. START NEXT PREVIOUS SLIDE Quiz by Dr. John Dayton QUIT 1. What is the SI unit of energy? A. newton B. erg C. joule D. dyne START NEXT PREVIOUS SLIDE Quiz by Dr. John Dayton QUIT 2. Kinetic energy is the mechanical energy of __________ . A. motion B. position C. mass D. acceleration START NEXT PREVIOUS SLIDE Quiz by Dr. John Dayton QUIT 3. What factors are needed to compute work done? A. the mass of an object and its speed B. the speed of an object and how far it’s moved C. the kinetic energy of an object and its direction D. the net force acting on an object, its displacement, and the angle between the two. START NEXT PREVIOUS SLIDE Quiz by Dr. John Dayton QUIT 4. Which equation below correctly computes work? A. W Fv B. W F cos( ) x C. W F cos( )v D. W F sin()x START NEXT PREVIOUS SLIDE Quiz by Dr. John Dayton QUIT 5. The net work done on an object is A. the work done by internal forces. B. the work done by the net force acting on the object. C. the sum of all the object`s energies. D. the change in the object`s mechanical energy. START NEXT PREVIOUS SLIDE Quiz by Dr. John Dayton QUIT 6. Which of the following is not a mechanical energy, per se? A. work B. potential energy C. kinetic energy D. potential and kinetic energies added together START NEXT PREVIOUS SLIDE Quiz by Dr. John Dayton QUIT 7. The symbol used to represent kinetic energy is A. E B. PE C. U D. KE START NEXT PREVIOUS SLIDE Quiz by Dr. John Dayton QUIT 8. What does the following expression represent? KE A. The total kinetic energy of an object. B. The final kinetic energy of an object. C. The amount of kinetic energy lost to motion. D. The change in an object’s kinetic energy. START NEXT PREVIOUS SLIDE Quiz by Dr. John Dayton QUIT 9. What does the following expression equal? KE A. the change in potential energy B. the change in total energy C. the net work done D. the net force acting START NEXT PREVIOUS SLIDE Quiz by Dr. John Dayton QUIT 10. Work and energy are ________ quantities. A. vector B. scalar C. tensor D. pseudo START NEXT PREVIOUS SLIDE Quiz by Dr. John Dayton QUIT 11. What is potential energy? A. It is the mechanical energy of an object due to its position. B. It is the mechanical energy of an object due to its motion. C. It is the change in kinetic energy of an object. D. It is the net mechanical energy of an object. START NEXT PREVIOUS SLIDE Quiz by Dr. John Dayton QUIT 12. If an object is moved so that its elevation above the ground increases, how does its gravitational potential energy change? A. it remains constant B. it decreases C. it increases D. there is not enough information to tell START NEXT PREVIOUS SLIDE Quiz by Dr. John Dayton QUIT 13. If the height above the ground of an object is doubled, the object`s potential energy ________ . A. increases by a factor of 4 B. decreases by a factor of 4 C. decreases by a factor of 2 D. increases by a factor of 2 START NEXT PREVIOUS SLIDE Quiz by Dr. John Dayton QUIT 14. Which characteristic listed below, is not a characteristic of the work done by a conservative force? A. the work done moving an object is independent of the path taken between start and finish points B. the work done moving an object around any closed path is zero C. the work done moving an object depends only on the start and end points of the motion D. the work done moving an object depends on the mass of the object and not on the start and finish points START NEXT PREVIOUS SLIDE Quiz by Dr. John Dayton QUIT 15. Which force listed below is a conservative force? A. air resistance B. friction C. spring force D. tension START NEXT PREVIOUS SLIDE Quiz by Dr. John Dayton QUIT 16. What do conservative forces conserve? A. potential energy B. kinetic energy C. total mechanical energy D. net work START NEXT PREVIOUS SLIDE Quiz by Dr. John Dayton QUIT 17. If a mass attached to a spring is displaced x from equilibrium and has a net force of Fo acting on it, what force will act on the mass when it is displaced 2x from equilibrium? A. 2Fo B. Fo/2 C. Fo/4 D. 4Fo START NEXT PREVIOUS SLIDE Quiz by Dr. John Dayton QUIT 18. Which equation is not an expression of the work-energy theorem? A. KE PE WNC B. KE WNET C. E WNC D. PE WC START NEXT PREVIOUS SLIDE Quiz by Dr. John Dayton QUIT 19. A flowerpot falls from a windowsill 10.0 m above the ground. At what height above the ground will the flowerpot`s kinetic and potential energies be equal? A. 10.0 m B. 5.0 m C. 0.0 m D. They will never be equal because they are conserved. START NEXT PREVIOUS SLIDE Quiz by Dr. John Dayton QUIT 20. Average Power is __________ . A. the ratio of work to total mechanical energy B. the ratio of kinetic to potential energy C. the rate at which force is applied D. the rate at which work is done. START NEXT PREVIOUS SLIDE Quiz by Dr. John Dayton QUIT 21. What is the SI unit for power? A. joule B. watt C. erg D. kilovolt START NEXT PREVIOUS SLIDE Quiz by Dr. John Dayton QUIT 22. How is instantaneous power calculated? A. B. C. D. P F x P W x F P v P Fv START NEXT PREVIOUS SLIDE This is the last question of this quiz. Quiz by Dr. John Dayton QUIT