# Pendulum problem

1. Apr 23, 2008

### aam11

How do you calculate the period of a physical pendulum?

Last edited: Apr 23, 2008
2. Apr 23, 2008

### physixguru

Hint:

Calculate moment of inertia.The mass is known.'g' is of course known.

where I is the moment of inertia; in this case I = mr^2/2. When θ is small, and therefore the expression becomes