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Chapter8

# Chapter8 - RotationalMotion Chapter8 AltaHighPhysics...

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Alta High Physics Rotational Motion Chapter 8

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Alta High Physics Important Variable θ (theta) – angular displacement – radians ω (omega) – angular velocity – radians/sec α (alpha) = angular acceleration – radians/sec 2 t – still time and still in seconds
Alta High Physics Measuring Angular  Displacement θ  = L/r 360° = 2 π radians = 1 revolution v= ωr = Linear velocity = angular velocity x radius a = αr Linear acceleration = angular acceleration x radius θ r L

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Alta High Physics Sample Problems If an exploding fireworks shell makes a  10° angle in the sky and you know it is  2000 meters above your head, how  many meters wide is the arc of the  explosion?
Alta High Physics Solution θ  = L/r θ  = 10° x  π rad/180° = 0.17 rad 0.17 rad = L/2000 meters L = 2000 meters x 0.17 rad = 349 meters

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