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UB PHY 107 - Rolling

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PHY 107 1st Edition Lecture 24 Outline of Last Lecture I. TorqueOutline of Current LectureII. Rolling Current LectureRolling: - Translational and rotational motion: vcom = Rω- Pure rotational motion: ω = vcom/R Contact point, p, between object and the ground: rotation axis at p changes with time - Kinetic energy of rolling K = ½ Icomω2 + ½ Mv2 o [½ Icomω2] – rotation about center of mass O with angular velocity ωo [½ Mv2] – kinetic energy due to translational motion of every point with speed vcom - Friction and rolling  acom = Rα - Rolling down a ramp  acom = gsin θ1+IcomMR2 These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- Torque (τ) ´τ = ´r x


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