The Moment of Inertia for a Sphere Shell of radius `r_2`, with centered spherical cavity of radius `r_1` and mass `m` When the cavity radius `r_1=0`, the object is a solid sphere. The following formula is used: `I=(2m)/5((r_2^5-r_1^5)/(r_2^3-r_1^3))`, where:
The formula and equation for Moment of Inertia are from Wikipedia (https://en.wikipedia.org/wiki/List_of_moments_of_inertia).