# Recent content by Quartz

1. ### Find the moment of inertia of this disk help

wans't my original post "04.10.08, 09:32"? and I got help from my teacher so there.
2. ### Find the moment of inertia of this disk help

Thanks! wow great help!! this forum is the bestest!!!!!!!!!! so you mean I pretend it's a solid and then subtract the drilled hole? then with the theorem and some substitution i can get the answer!? wow great, thanks so much. too bad i handed this homework in days ago. but thank god you...
3. ### Find the moment of inertia of this disk help

Homework Statement A curcial part of a piece of machinery starts as a flat uniform cylindrical disk of radius R0 and mass M. It then has a circular hole of radius R1 drilled into it. The hole's center is a distance h from the center of the disk. Find the moment of inertia of this disk (with...
4. ### One more problem

A curcial part of a piece of machinery starts as a flat uniform cylindrical disk of radius R0 and mass M. It then has a circular hole of radius R1 drilled into it. The hole's center is a distance h from the center of the disk. Find the moment of inertia of this disk (with off-center hole) when...
5. ### Derivation of moment inertia formula

How do I derive the formula 1/12 Ml^2? Derive the formula for moment of inertia of a uniform thin rod of length l about an axis through its center perpendicular to the rod.