This isn't quite a homework question, but my calculus teacher mentioned to those of us also taking physics that it was possible to prove that I = .5MR^2 using calc. I had some extra time on my hands and decided to give it a try. I've tried doing a summation with a geometric series but then ran into trouble defining a and r [using the equation a/(1-r)]. Does anyone out there know how to do this?(adsbygoogle = window.adsbygoogle || []).push({});

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Derivation of Moment of Inertia Equation for Solid Discs

**Physics Forums | Science Articles, Homework Help, Discussion**