Moments of Inertia
Object
Moment of Inertia
Comment

Since all points of the hoop are equidistant from the axis, this one is easy. See below for the MOI of a disk.

This is related to the above by the Perpendicular Axis Theorem

See the derivation below for an annular ring.

See the derivation below for a rod through its center.

This is related to the above by the Parallel Axis Theorem

See the derivation below for a shell.

See the derivation below for a sphere

See the derivation below for a slab

Parallel Axis Theorem

This is proven in the text. Suppose the MOI of an object of mass m for an axis passing through its center of mass (cm) is Icm. Then the moment of inertia for that object about an axis parallel to the original axis and a distance h from the original axis is given by:


Perpendicular Axis Theorem

Here


Disk

Here


Ring

Here


Rod

Here


Shell

Here


Sphere

Here


Slab

Here