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Rotational Motion

Moment of inertia

  • Moment of inertia of a body about a given axis is the sum of the products of masses of all the particles of the body and squares of their respective perpendicular distance from the axis of rotation.

                 

  • K.E. of rotation of body  
  • Mass (m) of the body is an analogue of moment of inertia (I) of the body in rotational motion.

Radius of gyration

  • Radius of gyration of a body about a given axis is the perpendicular distance o…

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