SAT Subject Physics Practice Question 654: Answer and Explanation

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Question: 654

5. When a skydiver jumps from an airplane, he eventually reaches terminal velocity. At that time the force of the air resistance is

A. equal to his mass.
B. equal to twice his mass.
C. equal to his weight.
D. equal to twice his weight.
E. equal to 1/2 his weight.

Correct Answer: C

Explanation:

The correct answer is (C). The skydiver accelerates after he jumps until the friction from the air is equal to his downward force, which is his weight.

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