next up previous
Next: proof: Up: Cool Theorems about I Previous: proof:

perpendicular axis theorem

Suppose you have planar object, that is, one that is flat. An example of this is a floppy disk, or a cdrom. Suppose the object is in the x-y plane. If you rotate it the z axis, the moment of inertia is tex2html_wrap_inline857 . If you rotate it by the x or y axes, the moment of inertia is tex2html_wrap_inline783 , or tex2html_wrap_inline861 respectively. Then



Joshua Deutsch
Wed Jan 22 17:07:34 PST 1997