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Define moment of inertia...

Define moment of inertia

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Moment of inertia of a rigid body about a given axis of rotation is given by sum of product of masses of particles of system and square of their distance from axis of rotation.
`I=m_1r_1^2 +m_2r_2^2 +m_3r_3^2+.....+m_nr_n^2=sum_(i=1)^(n)m_ir_i^(2)`
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