Hi friends the problem is as:(adsbygoogle = window.adsbygoogle || []).push({});

While finding moment of inertia of the system about the point from where the rod is fixed, the book says that M.I. of the system will be,

I = I_{rod}+ I_{disc}

I = [1/3m(2R)^{2}] + [m(2R)^{2}]-----------(1)

Sorry in the figure the length of the rod is 2R.

But I think that it should be

I = I_{rod}+ I_{disc}

I = [1/3m(2R)^{2}] + [1/2m(R)^{2 + }m(2R)^{2}] - - - -- - (2)

(Using parallel axis theorem)

Please friends tell why it is so?

While the (2)^{nd}M.I. which I got, the book says that it will be for,

Please friend help me in this confusion. I will appreciate the help.

Thank you all in advance.

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# Moment of inertia problem

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