AP Physics 1 Question 137: Answer and Explanation

Test Information

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Question: 137

7. A man stands on a platform scale in an elevator. The elevator moves upward, speeding up. What is the action-reaction force pair to the man’s weight?

  • A. The force of the elevator cable on the man
  • B. The force of the man on the scale
  • C. The force of the elevator cable on the elevator
  • D. The force of the man on the Earth

Correct Answer: D

Explanation:

D-The man's weight is the force of the Earth on the man. The Newton's third law force pair is then the force of the man on the Earth.