SAT Subject Physics Practice Question 564: Answer and Explanation

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Question: 564

5. An object falls with constant acceleration near the earth. Which statement best describes the velocity of the object?

A. The velocity is constant.
B. The velocity is decreasing.
C. The velocity constantly changes in proportion to its weight.
D. The velocity is not related to its acceleration.
E. The velocity changes by the same amount each second.

Correct Answer: E


The correct answer is (E). Look at the graph of velocity. It is a straight line. The velocity increases by the same amount each second, additional proof that V = at.

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