Question

A simple pendulum of frequency n is taken up to a certain height above the ground and then dropped along with its support so that it falls freely under gravity. The frequency of oscillations of the falling pendulum will

• A. Remain equal to n
• B. Become greater than n
• C. Become less than n
• D. Become zero

Answer 1

The correct option is D Become zero

The frequency of a pendulum is given by n = $\frac{1}{2\pi }\sqrt{\frac{g}{l}}$ Where g is the acceleration due to gravity. A pendulum falling freely is weightless, i.e., the effective gravity is zero. Therefore, its frequency becomes zero and it stops oscillating. Hence the correct choice is (d)