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In general, I=[inte]R

EDIT: One more question. If we know the moments of interia of say two bodies, how do we find the moment of inertia of the system? Is it simply the sum of the moments?

^{2}dm. First of all, what is R? R is the component of the position vector that is perpendicular to both the angular and linear velocity. Is this correct?EDIT: One more question. If we know the moments of interia of say two bodies, how do we find the moment of inertia of the system? Is it simply the sum of the moments?

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