A physical pendulum is any extended object.
For a physical pendulum ω  =  ( 

)  ^{½} 
Here h is the distance from the rotation point to the pendulum's center of gravity.
Example: A rod of length L supported at one end.
h  = 

and  I  = 

mL^{2} 
This gives an angular frequency of:
ω  =  ( 

)  ^{½} 
the same frequency as a simple pendulum of length of 2L/3.