A Spinning Sphere

Calculating the moment of inertia of sphere. Overlong in itself, but hopefully a fine preliminary to the related calculation for a tetrahedron.

Martin Oldfield, 05 Jun 2013

Moments of Inertia

Some basic facts about the moment of inertia

Martin Oldfield, 05 Jun 2013

A Turning Tetrahedron

The tetrahedron's a simple solid, but its moment of inertia isn't in the usual tables, so I thought I'd calculate it. There are two calculations here: one's straightforward but long, the other's short and cunning.

Martin Oldfield, 05 Jun 2013