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yttuncel
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Homework Statement
Find the moment of Inertia of a cube (mass M, length L) around an axis going through one of the edges.
Homework Equations
I=Ʃmr2
The Attempt at a Solution
Well I imagined the cube is formed of infinitely many square plates. The width of the square plate is dL.
ρ=M/L3
dm=ρ*L2*dL
so now I am stuck with the integral what is r? is r = L√2/2 from pythagorean thm ?