SAT Subject Physics Practice Question 393: Answer and Explanation

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Question: 393

14. A team of skydivers jumps from a plane and holds hands to form a flower-like design. As the skydivers begin their free fall, their velocity increases and their

A. acceleration increases.
B. acceleration decreases.
C. acceleration is constant.
D. acceleration is zero.
E. air resistance is reduced.

Correct Answer: B


The correct answer is (B). The acceleration of the skydivers continues to decrease until the terminal velocity of the group is reached. When the air resistance reaches the point where it exactly balances the force exerted on the divers by the earth's gravitational attraction, their acceleration becomes zero.

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