Moment Of Inertia Of Sphere At A Distance

Chronothread

If a sphere is at a certain radius from the axis of rotation greater then the radius of the sphere can you just take the moment of inertia as a point mass, I=mr^2?

Thanks for your time.

Doc Al

No. Use the parallel axis theorem to find the moment of inertia about the axis.

JANm

We have two radii to define: one for the shape of the sphere and the other for the (circular) movement it is in.