Practice Quiz

MCAS Physics Exam Practice - Question List

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41. Two students are standing next to each other on a level field. One of the students throws a table tennis ball forward toward a line 2.0 m away. At the same time, the second student throws a bowling ball in the same direction. Both balls take the same time to travel the 2.0 m.Only the second student feels a noticeable backward push when she throws her ball.Which of the following statements explains why only the second student feels a noticeable backward push?
  1. The bowling ball exerts a much larger reaction force.
  2. The bowling ball undergoes a much larger acceleration
  3. The bowling ball requires more force to overcome gravity.
  4. The bowling ball converts more inertia into kinetic energy
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42. A copper sphere, a glass sphere, a plastic sphere, and a rubber sphere are placed on individual insulating stands. A student touches each sphere with an electrically charged object.The sphere made of which material will distribute the electric charge fastest over its entire surface area?
  1. copper
  2. glass
  3. plastic
  4. rubber
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43. A person is using a force of 200 N to push a box. How much power does the person need to push the box a distance of 4 m in 10 s?
  1. 40 W
  2. 80 W
  3. 200 W
  4. 500 W
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44. Which of the following will always change when an object accelerates?
  1. mass
  2. potential energy
  3. velocity
  4. weight
  5. NEW CHOICE
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45. In a television set with a cathode ray tube display, a beam of negatively charged particles called cathode rays passes by a positively charged plate. The beam is deflected before it hits the television screen to produce an image. Which of the following changes would result in the greatest increase in the attraction between the negatively charged particles in the beam and the positively charged plate?
  1. increasing the distance between the plate and the particles and increasing the charge on the plate
  2. increasing the distance between the plate and the particles and decreasing the charge on the plate
  3. decreasing the distance between the plate and the particles and increasing the charge on the plate
  4. decreasing the distance between the plate and the particles and decreasing the charge on the plate
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