PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 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.

PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 1. What is the SI unit of energy? C. joule D. dyne A. newton B. erg

PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 2. Kinetic energy is the mechanical energy of __________. C. mass D. acceleration A. motion B. position

PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 3. What factors are needed to compute work done? 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. A. the mass of an object and its speed B. the speed of an object and how far it’s moved

PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 4. Which equation below correctly computes work? C. D. A. B.

PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 5. The net work done on an object is C. the sum of all the object`s energies. D. the change in the object`s mechanical energy. A. the work done by internal forces. B. the work done by the net force acting on the object.

PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 6. Which of the following is not a mechanical energy, per se? C. kinetic energy D. potential and kinetic energies added together A. work B. potential energy

PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 7. The symbol used to represent kinetic energy is C. U D. KE A. E B. PE

PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 8. What does the following expression represent? C. The amount of kinetic energy lost to motion. D. The change in an object’s kinetic energy. A. The total kinetic energy of an object. B. The final kinetic energy of an object.

PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 9. What does the following expression equal? C. the net work done D. the net force acting A. the change in potential energy B. the change in total energy

PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 10. Work and energy are ________ quantities. C. tensor D. pseudo A. vector B. scalar

PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 11. What is potential energy? C. It is the change in kinetic energy of an object. D. It is the net mechanical energy of an object. 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.

PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 12. If an object is moved so that its elevation above the ground increases, how does its gravitational potential energy change? C. it increases D. there is not enough information to tell A. it remains constant B. it decreases

PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 13. If the height above the ground of an object is doubled, the object`s potential energy ________. C. decreases by a factor of 2 D. increases by a factor of 2 A. increases by a factor of 4 B. decreases by a factor of 4

PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 14. Which characteristic listed below, is not a characteristic of the work done by a conservative force? 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 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

PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 15. Which force listed below is a conservative force? C. spring force D. tension A. air resistance B. friction

PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 16. What do conservative forces conserve? C. total mechanical energy D. net work A. potential energy B. kinetic energy

PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 17. If a mass attached to a spring is displaced  x from equilibrium and has a net force of F o acting on it, what force will act on the mass when it is displaced 2  x from equilibrium? C. F o /4 D. 4F o A. 2F o B. F o /2

PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 18. Which equation is not an expression of the work-energy theorem? C. D. A. B.

PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 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? C. 0.0 m D. They will never be equal because they are conserved. A m B. 5.0 m

PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 20. Average Power is __________. C. the rate at which force is applied D. the rate at which work is done. A. the ratio of work to total mechanical energy B. the ratio of kinetic to potential energy

PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 21. What is the SI unit for power? C. erg D. kilovolt A. joule B. watt

PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 22. How is instantaneous power calculated? C. D. A. B. This is the last question of this quiz.