What is y bar in moment of inertia?

The moment of inertia (MI) of a plane area about an axis normal to. Video on how to calculate the centroid and moment of inertia for any cross- section using the. The Moment of Inertia (I) is a term used to describe the capacity of a. For instance, if the moment of inertia of the section about its horizontal (XX) axis was required then the vertical (y) centroid would be needed. Suppose that the lamina is rotated about the y−axis.