Inertia
posted by Mary on .
A thin, uniform rod is bent into a square of side length a.
If the total mass is M , find the moment of inertia about an axis through the center and perpendicular to the plane of the square. Use the parallelaxis theorem.
Express your answer in terms of the variables M and a.
PLEASE HELP WITH A THOROUGH EXPLANATION PLEASE!!!

We may disagree on thorough explaination. I am not doing students work for them.
Look at the square. It has sides a/4, and M/4. Now if you look at it from the center, the moment of inertia could be calculated from the I of any of those rods, moved with the parallel axis theorm to the center (a distance of a/8), then multiplyied by 4 due to all the rods contribution.
I will be happy to critique your thinking or work. Repost if if you need help. 
so would I = ma^2? i am confused

billy