SAT Subject Physics Practice Question 633: Answer and Explanation

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Question: 633

14. Two vectors X and Y are added together. Which of the following statements could be true?

I. The resultant magnitude is smaller than X.

II. The resultant magnitude is larger than Y.

III. The resultant direction is the same as either X or Y.

A. I only
B. II only
C. I and III only
D. II and III only
E. I, II, and III

Correct Answer: E


The correct answer is (E). If the two vectors are exactly 180° apart, in each case all of the choices are a possibility.

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