Question

A simple pendulum is hollow from within and its time period is T. How is the time period of pendulum affected when :

1. 1/4 of bob is filled with mercury
2. 3/4 of bob is filled with mercury
3. The bob is completely filled with mercury?

Answer 1

We know that the time period of a simple pendulum is independent of its mass. So in all the above said cases, the time period of the simple pendulum remains the same.