2. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton Physics Quiz FORCE 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 corners of the slides to advance questions.

3. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 1. The SI unit of force is the __________. C. erg D. newton A. joule B. dyne

4. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 2. Which of the following is not a force? C. The normal D. weight A. tension B. Coefficient of friction

5. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 3. In a system of interacting objects, the sum of all interactions (internal forces) is __________. C. always the net, non-zero, force on the system. D. never zero. A. always zero. B. sometimes zero.

6. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 4. In the equation F=ma, the "F" represents __________. C. the magnitude of the net internal force acting within the object. D. the vector sum of the internal forces acting within the object. A. the vector force acting on the object. B. the magnitude of the net force acting on the object.

7. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 5. Force is a __________ quantity. C. pseudo D. scalar A. vector B. tensor

8. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 6. If an object is in free-fall, what is the reaction force to the object`s weight? C. this is an example of an exception to Newton`s laws of motion. D. air resistance A. the force of impact when the object strikes the ground. B. the force of gravity pulling upward on the earth as earth interacts with the object.

9. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 7. Static friction exists when __________. C. two objects would slide across each other if static friction were not applied D. the normal force pushing up from the surface is non-zero A. an object slides uniformly across the surface of another object B. the normal force pushing up from the surface is zero

10. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 8. The force of gravity between two objects is directly proportional to __________. C. the sum of their masses D. the square root of the sum of the squares of their masses A. the distance between their centers of mass B. the product of their masses

11. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 9. A reference frame can only be an inertial frame if it is not moving. A. TRUE B. FALSE

12. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 10. Your apparent weight (what you "feel") is actually the magnitude of the normal force from the surface of which you are in contact. A. TRUE B. FALSE

13. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 11. The acceleration of a body is inversely proportional to the magnitude of the net external force acting on the body. A. TRUE B. FALSE

14. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 12. The sum of all internal forces with a system of objects is zero. A. TRUE B. FALSE

15. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 13. Two unequal masses attracted by their mutual gravitational force accelerate toward each other with equal accelerations. (Assume no other forces are acting.) A. TRUE B. FALSE

16. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 14. In the absence of a net external force, the center of mass of a system of objects maintains a state of uniform motion. A. TRUE B. FALSE

17. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 15. The maximum value of static friction between two surfaces is determined by two factors: the roughness of the surfaces, and how strongly they are pressed together. A. TRUE B. FALSE

18. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton This is the last question of this quiz. 16. The force of tension, at any point along a "massless" rope, acts __________. C. equally in both directions D. is zero except at the endpoints of the rope A. toward the object with the greater pull B. perpendicular to the rope