SAT Subject Physics Practice Question 660: Answer and Explanation

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Question: 660

11. A pendulum swings at a rate of .75 vibration/ sec. Which of the following changes could be made to the pendulum to cause the period of the pendulum to increase?

A. Mass of the bob was increased
B. Length of the pendulum was increased
C. Mass of the bob was decreased
D. Length of the pendulum was decreased
E. The material from which the pendulum bob was made

Correct Answer: B

Explanation:

The correct answer is (B). An increase in the length of the pendulum causes the period of the pendulum to increase too. . Notice the in the period equation.

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