MCAS Physics Exam Practice - Question List

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66.

Which of the following has the greatest momentum?

  1. a 60 kg deer moving west at a speed of 16.4 m/s
  2. a 6300 kg elephant moving east at a speed of 0.11 m/
  3. a 0.42 kg soccer ball moving downfield at a speed of 12 m/s
  4. a 0.03 kg arrow moving toward a target at a speed of 150 m/s
67. Which of the following is an example of an electromagnetic wave?
  1. a radio wave
  2. a water wave
  3. the oscillation of a spring
  4. the vibration of a violin string
68. Which of the following statements best explains why it is usually easier to keep a sliding object moving than it is to start the object moving?
  1. Kinetic friction is typically equal to static friction.
  2. Kinetic friction is typically less than static friction.
  3. Kinetic friction is a force that resists attempts to start an object moving.
  4. Kinetic friction is a force that opposes the sliding of two objects over each other.
69. Radio waves, visible light, and x-rays are examples of electromagnetic waves that always differ from each other in
  1. amplitude.
  2. intensity.
  3. temperature.
  4. wavelength.
70. Two oppositely charged objects are separated by a small distance. The objects are then moved three times farther apart from each other. Which of the following statements best describes what happens to the electrical force between the objects?
  1. The force of attraction increases.
  2. The force of attraction decreases.
  3. The force of attraction becomes zero.
  4. The force of attraction stays the same.

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