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# Chapter 11: C11) Rotational Energy


• 11.1: Rotational Kinetic Energy, and Moment of Inertia
• 11.2: Rolling Motion
• 11.3: Examples
The rotational kinetic energy is the kinetic energy of rotation of a rotating rigid body or system of particles. The moment of inertia for a system of point particles rotating about a fixed axis is the sum of the product between the mass of each point particle and the distance of the point particles to the rotation axis. In systems that are both rotating and translating, conservation of mechanical energy can be used if there are no nonconservative forces at work.

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