Posted by Mary on Monday, November 3, 2008 at 1:03am.
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!!!

Inertia  bobpursley, Monday, November 3, 2008 at 5:04am
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.

Inertia  Mary, Monday, November 3, 2008 at 1:21pm
so would I = ma^2? i am confused

Inertia  jarded, Tuesday, December 1, 2015 at 12:48am
billy
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