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Introductory Physics Homework Help
Moment of inertia with system of rods
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[QUOTE="Nathanael, post: 6016784, member: 509990"] Your discrete definition of rotational inertia also has a continuous form which should be used for continuous bodies, like rods. The inertia of the middle bar about one of the edge bars comes from that integral over all the mass. The inertia is not the same if you replace the body with a point-mass at its center, which is what your math seems to be doing. Your math also seems to say that the inertia of one edge bar about the other edge bar is zero? [/QUOTE]
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Moment of inertia with system of rods
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