SAT Subject Physics Practice Question 628: Answer and Explanation

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Question: 628

9. A batter hits a long fly ball. Neglecting friction, which of the following statements is/are true?

I. The time the ball is in free fall determines the horizontal distance it travels.

II. The ball reaches its maximum velocity at the highest point of its flight.

III. The upward velocity can never be greater than the horizontal velocity.

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

Correct Answer: A


The correct answer is (A). In this problem the object has both horizontal and vertical motion. The original velocity of the object can be of large magnitude on either the x axis or the y axis. It is absolutely true, however, that the object can only travel along the x (horizontal) axis as long as it is in free fall.

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