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Praxis II Middle School Content Knowledge Test Prep

Category - Praxis Middle School Content Knowledge Practice Test

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One 7.0 kg bowling ball is lifted to a storage shelf 1.0 m above the fl oor. A second 7.0 kg ball is lifted to a storage shelf 2.0 m above the fl oor.

Which of the following best explains why the measured force of gravity on each ball is nearly identical?
  1. The final potential energy of each ball increased.
  2. The amount of work required to lift each ball is identical.
  3. The distance of each ball from Earth’s center of mass is almost identical.
  4. The gravitational force of each ball on the other cancels out the force of Earth’s gravity.
Explanation
Answer: C - The distance of each ball from Earth’s center of mass is almost identical.
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