# Moment of Inertia

To calculate the moment of inertia at o, I tried to apply (1/3mq^2) but I am not sure if it is correct. Any help would be appreciated.

## 1 Answer

It looks like the question assumes the rod to be of negligible mass.

Then the rotational moment of inertia is just $$I=mq^2$$

You may have confused the moment of inertia of a rod of mass m with length q.