Name: Class: Date: Multiple Choice Identify the choice that best completes the statement or answers the question.
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1 Name: Class: _ Date: _ Physics Test Multiple Choice Identify the choice that best completes the statement or answers the question. 1. A weather balloon records the temperature every hour. From the table above, the temperature a. increases. c. remains constant. b. decreases. d. decreases and then increases. 2. The time required to make a trip of km is measured at various speeds. From the graph above, what speed will allow the trip to be made in 2 hours? a km/h c km/h b km/h d km/h 3. Estimate the order of magnitude of the length of a football field. a m c m b m d m 1
2 Name: 4. According to the graph above, during which interval does the cat have the greatest positive velocity? a s c s b s d s 5. Which of the following line segments on a position versus time graph is physically impossible? a. a horizontal line c. a straight line that slopes to the right b. a straight line that slopes to the left d. a vertical line 2
3 Name: 6. In the graph above, how does the acceleration at A compare with the acceleration at B? a. The acceleration at A is positive and less than the acceleration at B. b. The acceleration at B is positive and less than the acceleration at A. c. The accelerations at A and B are each zero. d. The accelerations at A and B cannot be determined. 7. Which of the following line segments on a velocity versus time graph is physically impossible? a. horizontal line c. straight line with negative slope b. straight line with positive slope d. vertical line 8. The graph above describes the motion of a ball. At what point is the speed of the ball equal to its speed at B? a. A c. D b. C d. none of the above 3
4 Name: The figure above shows the path of a ball tossed from a building. Air resistance is ignored. 9. In the figure above, the horizontal component of the ball s velocity at A is a. zero. b. equal to the vertical component of the ball s velocity at C. c. equal in magnitude but opposite in direction to the horizontal component of the ball s velocity at D. d. equal to the horizontal component of its initial velocity. 10. In the figure above, at which point is the ball s speed about equal to the speed at which it was tossed? a. A c. C b. B d. D 11. The free-body diagram shown above represents a car being pulled by a towing cable. In the diagram, which of the following is the gravitational force acting on the car? a N c N b. 775 N d N 4
5 Name: 12. According to Newton s second law, when the same force is applied to two objects of different masses, a. the object with greater mass will experience a great acceleration, and the object with less mass will experience an even greater acceleration. b. the object with greater mass will experience a smaller acceleration, and the object with less mass will experience a greater acceleration. c. the object with greater mass will experience a greater acceleration, and the object with less mass will experience a smaller acceleration. d. the object with greater mass will experience a small acceleration, and the object with less mass will experience an even smaller acceleration. 13. A hockey stick hits a puck on the ice. Identify an action-reaction pair in this situation. a. The stick exerts a force on the puck; the puck exerts a force on the stick. b. The stick exerts a force on the puck; the puck exerts a force on the ice. c. The puck exerts a force on the stick; the stick exerts a force on the ice. d. The stick exerts a force on the ice; the ice exerts a force on the puck. 14. A child moving at constant velocity carries a 2 N ice-cream cone 1 m across a level surface. What is the net work done on the ice-cream cone? a. 0 J c. 2 J b. 0.5 J d. 20 J 15. For which of the following situations is the conservation of mechanical energy most likely to be a valid assumption? a. A skateboard rolls across a sewer grate. b. A parachutist falls from a plane. c. You rub your hands together to keep warm. d. A soccer ball flies through the air. 16. A ball with a momentum of 4.0 kg m/s hits a wall and bounces straight back without losing any kinetic energy. What is the change in the ball s momentum? a. 8.0 kg m/s c. 0.0 kg m/s b. 4.0 kg m/s d. 8.0 kg m/s 17. Two objects with different masses collide and bounce back after an elastic collision. Before the collision, the two objects were moving at velocities equal in magnitude but opposite in direction. After the collision, a. the less massive object had gained momentum. b. the more massive object had gained momentum. c. both objects had the same momentum. d. both objects lost momentum. 18. Two swimmers relax close together on air mattresses in a pool. One swimmer s mass is 48 kg, and the other s mass is 55 kg. If the swimmers push away from each other, a. their total momentum triples. c. their total momentum doubles. b. their momenta are equal but opposite. d. their total momentum decreases. 19. Which of the following confirms that gravitational mass and inertial mass are equivalent? a. Free-fall acceleration is the same throughout the universe. b. Free-fall acceleration is the same at all points where the gravitational field strength is the same. c. Newton s second law is valid throughout the universe. d. An object s weight can change with location, but the object s mass remains constant. 5
6 Name: 20. If you cannot exert enough force to loosen a bolt with a wrench, which of the following should you do? a. Use a wrench with a longer handle. b. Tie a rope to the end of the wrench and pull on the rope. c. Use a wrench with a shorter handle. d. You should exert a force on the wrench closer to the bolt. 21. Suppose a doorknob is placed at the center of a door. Compared with a door whose knob is located at the edge, what amount of force must be applied to this door to produce the torque exerted on the other door? a. one-half as much c. one-fourth as much b. two times as much d. four times as much 22. A child on a playground swings through a total of 32. If the displacement is equal on each side of the equilibrium position, what is the amplitude of this vibration? (Disregard frictional forces acting on the swing.) a. 8.0 c. 32 b. 16 d Two waves traveling in opposite directions on a rope meet and undergo complete destructive interference. Which of the following best describes the waves a moment after the waves meet and coincide? a. The waves no longer exist. b. The waves continue unchanged. c. The waves reflect and travel backward. d. A single wave continues along the rope. 24. A student sends a pulse traveling on a taut rope with one end attached to a post. What will the student observe? a. The pulse will not be reflected if the rope is free to slide up and down on the post. b. The pulse will be reflected and inverted if the rope is free to slide up and down on the post. c. The pulse will be reflected and inverted if the rope is fixed to the post. d. The pulse will not be inverted if the rope is fixed to the post. 25. A 3.0 m long stretched string is fixed at both ends. If standing waves with a wavelength of two-thirds L are produced on this string, how many nodes will be formed? a. 0 c. 3 b. 2 d. 4 6
7 Physics Test Answer Section MULTIPLE CHOICE 1. ANS: B PTS: 1 DIF: II OBJ: ANS: C PTS: 1 DIF: II OBJ: ANS: B PTS: 1 DIF: II OBJ: ANS: A PTS: 1 DIF: II OBJ: ANS: D PTS: 1 DIF: II OBJ: ANS: C PTS: 1 DIF: II OBJ: ANS: D PTS: 1 DIF: II OBJ: ANS: C PTS: 1 DIF: II OBJ: ANS: D PTS: 1 DIF: II OBJ: ANS: C PTS: 1 DIF: II OBJ: ANS: C PTS: 1 DIF: II OBJ: ANS: B PTS: 1 DIF: II OBJ: ANS: A PTS: 1 DIF: II OBJ: ANS: A PTS: 1 DIF: II OBJ: ANS: D PTS: 1 DIF: II OBJ: ANS: A Given p i = 4.0 kgm/s p f = 4.0 kgm/s Solution Δp = p f p i = Ê Ë Á 4.0 kgm/s ˆ 4.0 kgm/s = 8.0 kgm/s PTS: 1 DIF: II OBJ: ANS: A PTS: 1 DIF: II OBJ: ANS: B PTS: 1 DIF: II OBJ: ANS: B PTS: 1 DIF: II OBJ: ANS: A PTS: 1 DIF: II OBJ: ANS: B PTS: 1 DIF: II OBJ: ANS: B PTS: 1 DIF: II OBJ: ANS: B PTS: 1 DIF: II OBJ: ANS: C PTS: 1 DIF: II OBJ: ANS: D PTS: 1 DIF: II OBJ:
Name: Class: Date: d. none of the above
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