SAT Subject Physics Practice Question 601: Answer and Explanation

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Question: 601

12. A thrown baseball hits and breaks a glass window and ends up inside the house. Which of the following is correct about the ball?

A. The force the ball exerted on the window was larger than the force the window exerted on the ball.
B. The force the ball exerted on the window was smaller than the force the window exerted on the ball.
C. The force the ball exerted on the window was the same as the force the window exerted on the ball.
D. Since the ball broke the window, it didn't lose any momentum.
E. The kinetic energy the ball had before it broke the window equaled the kinetic energy the ball had after it broke the window.

Correct Answer: C

Explanation:

The correct answer is (C). All forces occur in pairs, are equal in magnitude and oppositely directed. The pairs of forces are the ball on the window, and the window on the ball, which are equal and opposite.

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