A simple pendulum of length L and mass M has frequency f.To increase its frequency to 2f:
A)increase its length to 4L
B)increase its length to 2L
C)decrease its length to L/2
D)decrease its length to L/4
E)decrease its mass to

Question

A simple pendulum of length L and mass M has frequency f.To increase its frequency to 2f:
A)increase its length to 4L
B)increase its length to 2L
C)decrease its length to L/2
D)decrease its length to L/4
E)decrease its mass to < M/4

Quizplus · Accepted Answer

The frequency of a simple pendulum is inversely proportional to the square root of its length. To double the frequency, the length must be reduced to a quarter, hence L/4.

A Simple Pendulum of Length L and Mass M Has