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Homework Statement
A non uniform disc of radius R has a mass of M. Its centre of gravity is located at a distance x from the centre. Find the moment of inertia of mass (moi) around the axis perpendicular to the surface passinf through the centre of gravity.
Homework Equations
Parallel axis theorem
Ioo = Igg + m[r^2]
Ioo = moi around axis required
Igg = moi around axis through centre of gravity
m = mass of the object
r = distance between the 2 axises(?dont know the plural)
Moi around the centre of a uniform disc
1/2m[r^2]
The Attempt at a Solution
[/B]I assumed that since Ioo = 1/2M[R^2]
Then using parallel axis theorem i took
Igg =1/2M[R^2] - M[x^2]
The problem is you can get a negative answer for Igg for certain x(>R/root2). So i think I am wrong some where in my assumptions. Can someone please clarify
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