A hollow sphere of radius 2 cm is attached to an 18 cm long thread to make a pendulum. Find the time period of oscillation of this pendulum. How does it differ from the time period calculated using the formula for a simple pendulum?

0.89 s, it is about 0.3% larger than the calculated value

length of the pendulum

This is a physical pendulum,

Where is the distance between center of mass and point of suspension.

If we consider this as a simple pendulum, then

Time period =

Difference in time period

% of

more than simple pendulum.