Practice - Centripetal Motion PDF

Practice - Centripetal Motion Name: Date: 1. An object traveling with uniform circular motion 4. What is the magnitude of the centripetal has a centripetal acceleration due to the chang...

Practice - Centripetal Motion Name: Date: 1. An object traveling with uniform circular motion 4. What is the magnitude of the centripetal has a centripetal acceleration due to the change in acceleration? A. speed B. direction A. 1 m/sec2 B. 10 m/sec2 C. kinetic energy D. mass C. 40 m/sec2 D. 4 m/sec2 2. The diagram here represents a mass of 5. Which quantity would increase if the radius 1.0 kilogram traveling at 8.0 meters per second in increased? a circular path of radius 4.0 meters. A. period B. tangential velocity C. mass D. centripetal acceleration What is the centripetal acceleration of the object? 6. If the 10-kilogram mass is replaced with a greater A. 10 m/sec2 B. 2.0 m/sec2 mass, the centripetal acceleration will C. 16 m/sec2 D. 4.0 m/sec2 A. decrease B. increase 3. The diagram shown represents a mass of C. remain the same 10.0 kilograms traveling at a constant speed of 4 meters per second in a horizontal circular path about point D. 7. If object O is moving in a uniform circular motion around point P at constant speed, which vector shown represents a centripetal force? A. B. C. D. The centripetal acceleration of the satellite is directed toward point A. A B. B C. C D. D page 1 8. If the velocity of a car traveling around a circular 11. The diagram shows an object with a mass of track doubles, its centripetal acceleration would be 1.0 kilogram attached to a string 0.50 meter long. The object is moving at a constant speed of 1 5.0 meters per second in a horizontal circular path A. 2 as great B. 2 times greater with center at point O. 1 C. 4 as great D. 4 times greater 9. An object on the end of a string rotates clockwise in a circle as shown in the diagram. If the string breaks when the object is at point X, which arrow below best represents the path of the object after the string has broken? A. What is the magnitude of the centripetal force acting on the object? B. A. 2.5 N B. 10 N C. 25 N D. 50 N C. 12. While the object is undergoing uniform circular motion, its acceleration A. has a magnitude of zero D. B. increase in magnitude C. is directed toward the center of the circle D. is directed away from the center of the circle 10. The diagram shows an object traveling clockwise in a horizontal, circular path at constant speed. 13. If the string is cut when the object is at the Which arrow best shows the direction of the position shown, the path the object will travel centripetal acceleration of the object at the instant from this position will be shown? A. A. toward the center of the circle B. ! B. a curve away from the circle C. # C. a straight line tangent to the circle D. " 14. If the string is lengthened while the speed of the object remains constant, the centripetal acceleration of the object will A. decrease B. increase C. remain the same page 2 Practice - Centripetal Motion 15. A 60-kilogram adult and a 30-kilogram child 19. What is the magnitude of the centripetal force are passengers on a rotor ride at an amusement acting on the cart? park. When the rotating hollow cylinder reaches a certain constant speed, v, the oor moves downward. Both passengers stay “pinned” against A. 8.0 N B. 20 N C. 40 N D. 50 N the wall of the rotor, as shown in the diagram. 20. Base your answer(s) to the following question(s) on the information and diagram below. A 1:00 103 -kilogram car is driven clockwise around a at circular track of radius 25.0 meters. The speed of the car is a constant 5.00 meters per second. Compared to the magnitude of the acceleration of the adult, the magnitude of the acceleration of the child is A. less B. greater C. the same 16. The diagram shows a 5.0-kilogram cart traveling clockwise in a horizontal circle of radius 2.0 meters at a constant speed of 4.0 meters per second. What minimum friction force must exist between the tires and the road to prevent the car from skidding as it rounds the curve? At the position shown, the velocity of the cart is A. 1:25 105 N B. 9:80 104 N directed toward point C. 5:00 103 N D. 1:00 103 N A. P B. Q C. R D. S 21. If the circular track were to suddenly become frictionless at the instant shown in the diagram, 17. At the position shown, the centripetal acceleration the car's direction of travel would be of the cart is directed toward point A. toward E B. toward N A. P B. Q C. R D. S C. toward W D. a clockwise spiral 18. If the mass of the cart was doubled, the magnitude of the centripetal acceleration of the cart would be A. unchanged B. doubled C. halved D. quadrupled page 3 Practice - Centripetal Motion 22. Base your answer(s) to the following question(s) 24. Base your answer(s) to the following question(s) on the information and diagram below. on the information given below. A 1200-kilogram car traveling at a Friction provides the centripetal force constant speed of 9.0 meters per second that allows a car to round a circular curve. turns at an intersection. The car follows a Find the minimum coe cient of friction needed horizontal circular path with a radius of between the tires and the road to allow a 25 meters to point P. 1600-kilogram car to round a curve of radius 80. meters at a speed of 20. meters per second. [Show all work, including formulas and substitutions with units.] 25. If the mass of the car were increased, how would that a ect the maximum speed at which it could At point P, the car hits an area of ice and loses round the curve? all frictional force on its tires. Which path does the car follow on the ice? A. A B. B C. C D. D 23. Calculate the magnitude of the centripetal force acting on Moon as it orbits the Earth, assuming a circular orbit and an orbital speed of 1:02 103 meters per second. [Show all work, including the equation and substitution with units.] page 4 Practice - Centripetal Motion