Problem about moment of inertia.
Question will be post in the comment box.
Thanks.

Question

Problem about moment of inertia.
Question will be post in the comment box.
Thanks.

anonymous · Answer

attachment

anonymous · Answer

What have you got so far?

anonymous · Answer

Do we need to assign the radius of the thin plane be r first?

anonymous · Answer

Ahm - it doesn't matter what you name the radius of the plane.. Do you know how to find the moment of inertia of an infinitessimal thin disk?

anonymous · Answer

(1/2)mr^2

anonymous · Answer

Well - to "proof" (using that word here is pretty ridiculous btw) this thing, you'll want to write down how came up with this 0.5mr^2...

It is correct but.. it didn't just fall out of the sky..

anonymous · Answer

Also... you got the moment of inertia of one little infinitessimal disk... just look at the picture - what will you have to do, to get I of the whole sphere?

anonymous · Answer

integration from a to -a?

anonymous · Answer

If you mean by that: integration along the vertical axis, then yes..

anonymous · Answer

I don't understand...