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# MOMENT OF INERTIA (I), The moment op imestia of a digid body about a fixed axis, is defined as the sum of the pocducts of masses of, the pasticles constituting the bady and the squares of their, respective distances from the axis of votation., I= mo?, m3, 64, my, i) SI unit of I is kom?., i1) Dimensional foomula of I is, ii) It is a Tensoo Quantity, as it has many, not one specified dioection., [MPT°]., divection but, iv) MOI tells about property ofabooky to esistchange, in state of Rest or State of Motion., V) factors on which MOI dopends,, Mass of the body,, • Sze & Shape of the body,, • Position & Orientation of the axis of sotation asrt. body., Mass distoibution.