AP Physics 1 Question 309: Answer and Explanation
Use your browser's back button to return to your test results.
7. A pendulum with a ball of mass m hanging from a string of length l is set in motion on Earth, and the system is found to have a frequency of f. If the length of the string were doubled, the hanging mass tripled, and the system moved to the moon, what would be the new frequency?
NOTE: Acceleration due to gravity of the Moon is approximately of Earth's.
- D. 12f
Correct Answer: B
The frequency of a pendulum is f = . Therefore, the change in mass would have no effect on the system, and the others would change the equation to f = . Thus, the original frequency f will become .