2. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton Physics Quiz CIRCULAR MOTION 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.

3. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 1. How many degrees are there in  radians? C. 45 D. 180 A. 90 B. 53

4. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 2. A particular sector of a a circle of radius 2 m spans an arc of 1.5 radians. What is the arclength (curved outer edge) of the sector? C. 3 m D. 2 m A.  m B. 1 m

5. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 3. Rotational motion may be analyzed with the same kinematic equations as linear motion under what condition? C. there is no linear motion D. the angular acceleration is zero A. the angular acceleration is constant B. the angular velocity is constant

6. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 4. What is centripetal acceleration? C. the angular acceleration of a rotating object D. the outward component of a rotating object`s acceleration A. the acceleration of an object moving about a circular path B. the component of an object`s acceleration directed toward the center of the circular path about which it is moving

7. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 5. What effect listed below is not manifested on an object in circular motion due to the tangential component of its acceleration? C. its direction changes D. its speed changes A. its angular speed changes B. its centripetal acceleration changes

8. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 6. Which of the following equations is incorrect? C. D. A. B.

9. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 7. What is centrifugal force? C. the net force that pulls you to the outside of a turn D. the net force acting in all cases A. an apparent or factious force B. the net force that pulls you to the inside of a turn

10. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 8. What is centripetal force? C. the net force that pulls you to the outside of a turn D. the net force acting in all cases A. an apparent or factious force B. the net force that pulls you to the inside of a turn

11. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 9. Is centripetal force a unique force like tension, gravity, or friction? A. no B. yes

12. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 10. Which of the vectors in the diagram shows the direction of the centripetal force acting on the object in circular motion? C. C D. none are correct A. A B. B A B C circular path object

13. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 11. A mass of 2 kg moves with a speed of 2 m/s about a circular path of 2 m radius. What is the magnitude of the centripetal force acting on it? C. 2 N D. 16 N A. 4 N B. 8 N

14. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 12. A roller coaster goes out of control and just makes it around a circular loop at minimum speed. A the very top of the loop, when the car is up-side-down, what is the magnitude of the normal force exerted by the track and acting on the car? C. minus the weight of the car D. twice the weight of the car A. the weight of the car B. zero

15. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 13. An object in free fall may travel along which of the following paths, given the right conditions? C. a parabola D. all of the above A. a line B. an ellipse

16. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 14. When an object under the influence of gravity experiences large changes in radial displacement so that its free fall acceleration can not be approximated as constant, what will its potential energy be? C. D. A. B.

17. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 15. Which is more dangerous to Earth? A. Being struck by an asteroid whose orbit crosses Earth`s. B. Being struck by an asteroid but coming in from outside the Solar System.

18. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 16. What is the definition of escape velocity? C. the velocity needed to make if far away (∞) from a planet with a constant speed and never return D. the velocity needed to make it far away (∞) from a planet with zero speed and never return A.the minimum velocity needed to lift off a planet`s surface B. the minimum velocity needed to get into orbit about a planet

19. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 17. If you go around a loop of radius 5 m on a roller coaster ride and experience twice your weight at the top of the loop when you are upside down, what is your speed? C. 4.4 m/s D. 12.1 m/s A. 7.0 m/s B. 9.9 m/s

20. PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton 18. A certain asteroid is in orbit about the sun with an orbital radius 3.2 times that of Earth`s. How many years does it take the asteroid to complete one orbit? C. 5.7 years D. 1.8 years A. 2.2 years B. 3.2 years This is the last question of this quiz.