- #1
blackbyron
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Homework Statement
A thick cylindrical ring of inner radius 29.0cm and thickness 2.8cm has a mass of 10.0kg. What is the moment of inertia of this cylinder about its central axis?
Homework Equations
I = (.5)(m)(ri^2+ro^2)
The Attempt at a Solution
I tried to use hollow cylinder formula, but the answer says it's wrong.
I don't know if I use the right inertia formula. I don't know if thickness is the outer radius. I confused.
Thanks