Rotation Kinetic Energy The kinetic energy of a rotating system looks similar to that of a point particle Point particle Rotating System KE=-mv KE=-I v is"linear velocity o is angular velocity m is the mass I is the moment of inertia about the rotation axis Physics 121: Lecture 18, Pg 3Physics 121: Lecture 18, Pg 3 Rotation & Kinetic Energy... The kinetic energy of a rotating system looks similar to that of a point particle: Point Particle Rotating System 2 I 2 1 KE =  I = m r i i i 2 2 2 1 KE = mv v is “linear” velocity m is the mass.  is angular velocity I is the moment of inertia about the rotation axis