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Calculating moment of inertia 
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#1
Mar1304, 12:48 PM

P: 50

I have a uniform rod of mass M, which rotates about one of its ends, and a point mass equal to the mass of the rod is added to the other end.
To calculate the new moment of inertia, do I just need to add the moment of inertia of the rod and that of the point mass together? i.e. I = (MR^2)/3 + MR^2 ? Any help would be much appreciated. 


#2
Mar1304, 01:20 PM

Sci Advisor
P: 986

Yes you add them together, but make sure you add them together with respect to the same axis. Remember the parallel axis theorum.



#3
Mar1304, 11:04 PM

P: 50

Cheers for that.



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