When calculating the moment of inertia of an object that may be considered to be composed of a number of distinct parts of simple and calculable geometric shape, the moment of inertia of the composite object about a given axis is calculated by: O Calculating the moment of inertia of each of the component parts about the axis of interest using the parallel axis theorem. O Multiplying the area of each part times the square of the distance from the centroidal axis to the given axis, then adding the terms together. O Determining the centroid of the composite area and calculating the second moment about the axis through that centroid. O Adding the moments of inertia of each of the component parts about their respective centroidal axes.

When calculating the moment of inertia of an object that may be considered to be composed of a number of distinct parts of simple and calculable geometric shape, the moment of inertia of the composite object about a given axis is calculated by: O Calculating the moment of inertia of each of the component parts about the axis of interest using the parallel axis theorem. O Multiplying the area of each part times the square of the distance from the centroidal axis to the given axis, then adding the terms together. O Determining the centroid of the composite area and calculating the second moment about the axis through that centroid. O Adding the moments of inertia of each of the component parts about their respective centroidal axes.