Moment of Inertia about y-y axis is defined as the quantity expressed by the body resisting angular acceleration. And is denoted by Jyy. Moment of Inertia about y-y axis is usually measured using the Meter⁴ for Second Moment of Area. Note that the value of Moment of Inertia about y-y axis is always positive. Typically, the value of Moment of Inertia about y-y axis is greater than 0.