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**Unformatted text preview: **moment of inertia (or rotational inertia) The unit for I is kg m 2 . Using this definition, we can write the kinetic energy of the rotating object as Note: in many previous problems we have assumed to be dealing with massless pulleys. This assumption assures that by applying conservation of mechanical energy we do not have to consider the kinetic energy related to the rotation of the pulley....

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