SAT Subject Physics Practice Question 412: Answer and Explanation

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Question: 412

3. A 750N person stands on a scale while holding a briefcase inside a freely falling elevator. Which of the following is true?

A. If the briefcase were released it would rise to the ceiling.
B. The person's acceleration is zero.
C. The person's attraction toward the earth is zero.
D. The person's apparent weight is zero.
E. If the briefcase were released it would fall to the floor.

Correct Answer: D

Explanation:

The correct answer is (D). The apparent weight is zero. The person is in free fall. No forces are acting on the person except gravity.

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