1. Semester Exam Review Number from 1 to 50 on your paper Select the best answer Press the F5 button on your keyboard

2. 1. Two resistors are in series. The total current is measured. A third resistor is added in series. As a result, the total resistance of the circuit will ___. a. increase b. decrease c. remain the same Semester Exam Review

3. 2. Two resistors are in parallel. The total current is measured. A third resistor is added in parallel. As a result, the total resistance will ___. b. decrease a. increase c. remains the same Semester Exam Review

4. 3. The amount of charge that passes a point per unit time is ___. c. current a. drift velocity b. voltage d. resistance Semester Exam Review

5. 4. In a series circuit the ___ is constant. In a parallel circuit the ___ is constant. b. current, voltage a. voltage, current c. resistance, current d. none of the above Semester Exam Review

6. 5. A circuit has two resistors in series – 100 Ω and 200 Ω. The current will be ___. a. greater in the 100 Ω resistor b. greater in the 200 Ω resistor c. the same in both resistors Semester Exam Review

7. 6. A circuit has two resistors in series – 100 Ω and 200 Ω. The voltage will be ___. b. greater in the 200 Ω resistor a. greater in the 100 Ω resistor c. the same in both resistors Semester Exam Review

8. 7. A circuit has two resistors in parallel – 100 Ω and 200 Ω. The current will be ___. a. greater in the 100 Ω resistor b. greater in the 200 Ω resistor c. the same in both resistors Semester Exam Review

9. 8. A circuit has two resistors in parallel – 100 Ω and 200 Ω. The voltage will be ___. a. greater in the 100 Ω resistor b. greater in the 200 Ω resistor c. the same in both resistors Semester Exam Review

10. 9. Ohm’s law states that V = IR. If the voltage is halved and the resistance stays the same the current ___. a. is halved b. is doubled c. is unchanged Semester Exam Review

11. 10. A series circuit contains four identical light bulbs (resistors). What happens to the power in the light bulbs if one light bulb breaks? b. The power in the remaining bulbs decrease slightly (dimmer). a. The power in the remaining bulbs increase (brighter). c. No power is supplied to the remaining bulbs (completely dark). Semester Exam Review

12. 11. When resistors are put into a parallel circuit the effective (total) resistance is ___. b. smaller than any one resistor in the circuit a. greater than any one resistor in the circuit c. the same as any one resistor in the circuit Semester Exam Review

13. 12. The symbol used to represent a power supply in a circuit is a ___. b. zig zag line a. straight line c. single line that is broken and has a bend in it. d. two parallel lines, one short one long Semester Exam Review

14. 13. A resistor is added to a parallel circuit. As a result, the ___. b. current through each resistor increases a. voltage across each resistor decreases c. power dissipated through each resistor increases d. none of the above Semester Exam Review

15. 14. As current moves in a circuit ___. b. electric potential energy is converted to a useful form a. electrons are lost to the surroundings c. the current loses charge d. all of the above are true Semester Exam Review

16. 15. Two resistors are in series. The total current is measured. A third resistor is added in series. As a result, the total current of the circuit will ___. b. decrease a. increase c. remain the same Semester Exam Review

17. 16. Two resistors are in parallel. The total current is measured. A third resistor is added in parallel. As a result, the total current will ___. a. increase b. decrease c. remains the same Semester Exam Review

18. 17. What statement is TRUE about a falling object and its momentum. a. Before it is released, it has no momentum. b. Its momentum increases as it falls. c. The more massive the object the greater its momentum at the bottom. d. All of the above are true. Semester Exam Review

19. 18. What statement is NOT true about momentum? a. Massive objects always have more momentum than lighter objects. b. Faster moving object always have more momentum than slower objects. c. Momentum is a scalar quantity. d. All of the above are NOT true. Semester Exam Review

20. 19. A massive truck drives down the road at 30 miles/hour. Later, the same truck decreases its velocity to 15 m/s. Consequently, the momentum of the truck ___. a. decreases by ¼ b. increases by 4 c. is unchanged d. decreases by ½ Semester Exam Review

21. 20. Momentum of an object is conserved only when ___. a. no forces act on the object b. the object is at rest c. no external forces (e.g. friction) act on the object d. the object is accelerating Semester Exam Review

22. 21. Two equal eggs are dropped from rest at the same height to the floor below. Egg A lands on the floor and cracks. The Egg B lands on a cushion and does not break. Which has a larger momentum change? a. Egg A b. Egg B c. Neither, they have the same momentum change. Semester Exam Review

23. 22. Which has the larger impulse acting on it? a. Egg A b. Egg B c. Neither, they have the same impulse Semester Exam Review

24. 23. Which has the larger force acting on it? a. Egg A b. Egg B c. Neither, they have the same impulse Semester Exam Review

25. 24. Two skaters are at rest on a frictionless pond. They push off each other and the 60 kg skater travels with a momentum of +240 kg×m/s. What is the momentum of the 75 kg skater? a. +240 kg×m/s b. -240 kg×m/s c. 0 kg×m/s d. Cannot be determined with information given Semester Exam Review

26. 25. What is the velocity of the 75 kg skater? a. -3.2 m/s b. 3.2 m/s c. 0.31 m/s d. -240 m/s Semester Exam Review

27. 26. What is the velocity of the 60 kg skater? a. -4.0 m/s b. 4.0 m/s c. 0.5 m/s d. 240 m/s Semester Exam Review

28. 27. What is the momentum change of the 60 kg skater? a. Cannot be determined from information given b. +240 kg×m/s c. -240 kg×m/s d. 0 kg×m/s Semester Exam Review

29. 28. What is the impulse given to the 60 kg skater? a. Cannot be determined from information given b. +240 kg×m/s c. -240 kg×m/s d. 0 kg×m/s Semester Exam Review

30. 29. Which statement is true regarding the force between the two skaters? a. The 75 kg skater exerts a larger force on the 60 kg skater. b. The 60 kg skater exerts a larger force on the 75 kg skater. c. The force that they exert on each other is the same. Semester Exam Review

31. 30. How can the impulse exerted on the 60 kg skater be increased? a. The skaters can push harder. b. The skaters can push for a longer period of time. c. Both a & b are true. Semester Exam Review

32. 31. Suppose a gun has the same mass as a bullet. Which statement is true about the velocity of the gun and the bullet after the bullet is fired? a. Their velocities are the same. b. The velocity of the bullet is larger. c. The velocity of the gun is larger. Semester Exam Review

33. 32. A 5 kg ball is traveling at a velocity of 3 m/s. What is the momentum of the ball? a. 8 kg×m/s b. 15 kg×m/s c. 22.5 kg×m/s d. 2 kg×m/s Semester Exam Review

34. 33. A 7.50 kg ball has a momentum of 125 kg×m/s. What is the velocity of the ball? a. 4.50 m/s b. 16.7 m/s c. 74.0 m/s d. 938 m/s Semester Exam Review

35. 34. A 1000 kg car traveling at +30.0 m/s collides with a 1500 kg car initially at rest. The cars stick together. This type of collision can best described as being inelastic. a. True b. False Semester Exam Review

36. 35. Padded dashboards and air bags lessen the blow to a passenger by decreasing the force exerted upon them. This is done by ___. a. decreasing the momentum change of the passenger b. decreasing the impulse experienced by the passenger c. increasing the time duration of the impact Semester Exam Review

37. 36. A force does work on an object if a component of the force ______ a. Is perpendicular to the displacement of the object b. Is parallel to the displacement of the object c. Perpendicular to the displacement of the object moves the object along a path that returns to its starting position. Semester Exam Review

38. 37. If the only force acting on an object during a given process is friction, which of the following can be made in regard to the object’s kinetic energy? a. The kinetic energy decreases. b. The kinetic energy increases. c. The kinetic energy remains constant. Semester Exam Review d. The kinetic energy decreases then increases.

39. 38. Which of the following energy forms is associated with an object due to its position relative to Earth? a. Gravitational energy b. Kinetic energy c. Elastic energy Semester Exam Review

40. 39. Which of the following is the rate at which energy is transferred? a. Gravitational energy b. Kinetic energy c. Mechanical energy Semester Exam Review d. Power

41. 40. What happens to the kinetic energy of a moving object when its velocity is halved? a. It becomes one-half of its initial value. b. It becomes four times its initial value. c. It becomes one-fourth its initial value. Semester Exam Review d. It becomes two times its initial value.

42. 41. What happens to the kinetic energy of an object whose mass halves and it velocity doubles? Semester Exam Review a. It becomes one-half of its initial value. b. It becomes four times its initial value. c. It becomes one-fourth its initial value. d. It becomes two times its initial value.

43. 42. Which object, at rest, has more gravitational energy? Semester Exam Review a. An object atop a 3-story building. b. An object atop a 4-story building. c. An object atop a 2-story building. d. Cannot be determined from information given

44. 43. Which statement is true about the kinetic, gravitational and mechanical (total) energy of a falling object? Semester Exam Review a. Kinetic , gravitational ,mechanical  d. Kinetic , gravitational ,mechanical  b. Kinetic , gravitational ,mechanical constant c. Kinetic , gravitational ,mechanical constant

45. 44. Which statement is true about the kinetic, gravitational and mechanical (total) energy of an object rolling up a hill. Semester Exam Review a. Kinetic , gravitational ,mechanical  d. Kinetic , gravitational ,mechanical  b. Kinetic , gravitational ,mechanical constant c. Kinetic , gravitational ,mechanical constant

46. 45. Which situation requires more work? Semester Exam Review a. Lifting a 1 kg object up 3 stories. d. Lifting a 3 kg object up 1 story. b. Lifting a 0.5 kg object up 6 stories. c. Lifting a 2 kg object up 2 stories.

47. 46. Which situation requires more power? Semester Exam Review a. Lifting a 1 kg object up 3 stories in 1 minute. d. Lifting a 3 kg object up 1 story in 45 sec. b. Lifting a 0.5 kg object up 6 stories in 30 sec. c. Lifting a 2 kg object up 2 stories in 2 minutes.

48. 47. The electric force between two objects is 100 N. The distance between the objects is halved. The new electric force is ___. Semester Exam Review a. 400 N d. 50 N b. 200 N c. 25 N

49. 48. The electric force between two objects is 50 N. The charge of both objects are doubled. The new electric force is ___. Semester Exam Review a. 400 N d. 50 N b. 200 N c. 25 N

50. 49. An object becomes charged by gaining or losing ___. a. electrons b. protons c. neutrons Semester Exam Review

51. 50. You have two objects, X and Y. Object X is charged negatively. Object Y is neutral. Object X will ___ object Y. a. attract b. repel c. not affect Semester Exam Review

52. 51. You have two objects, X and Y and they repel each other. You can conclusively say that ___. a. X and Y have opposite charges b. X and Y have the same charge c. either X or Y is neutral Semester Exam Review

53. 52. A conductor differs from an insulator in that a conductor ___. a. can become charged and an insulator cannot b. does not have any neutrons to get in the way of electron flow c. transfers charge easily d. has an excess of electrons Semester Exam Review

54. 53. Given the following electric field lines, what is the charge on the following object? a. Positive b. Negative Semester Exam Review

55. 54. Which particle has the largest charge? a. The positive charge. b. The negative charge. c. They are of equal charge. d. Cannot be determined. Semester Exam Review

56. 55. Which statement about the picture below must be true? a. Both of the charges are negative. b. Both of the charges are positive. c. The charges are oppositely charged. Semester Exam Review

57. 56. As a result of a charging process, both objects are left with the same charge. The charging process must be ___. a. friction b. conduction c. induction Semester Exam Review

58. 57. A neutral metal sphere is touched by a positive metal rod. As a result, the sphere will be ___ and the rod will be ___. a. negative, negative b. negative, positive c. positive, positive d. positive, negative Semester Exam Review

59. 58. A car travels over a circular path in a part of a road at a constant speed. The net force on the car is ______. a. directed forward, in the direction of travel b. zero, because the car is not accelerating c. directed towards the center of the curve d. None of the above Semester Exam Review

60. 59. A tin can whirled on the end of a strong moves in a circle because ______. a. there is an inward force acting on the can b. once the can starts moving, that is its natural tendency c. there is a force on a can pulling it outward d. the can continually pulls on the string Semester Exam Review

61. 60. If you whirl a tin can on the end of a string and the string breaks the can will ______. a. fly directly toward you b. fly directly away from you c. spiral away from your hand d. fly off, tangent to its circular path Semester Exam Review