PHYS 101 Lecture Notes - Lecture 19: Angular Velocity, Angular Acceleration, Circular Motion
13 Jul 2015
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Phys 101: physics for the life sciences lecture 19: Angular displacement - ( f i) k (radians) Consider a wheel rotating counterclockwise and speeding up. Angular velocity is positive and its getting more positive. Consider a wheel rotating counterclockwise and slowing down. Angular velocity is positive and its getting less positive. Consider a wheel rotating clockwise and speeding up. Angular velocity is negative and its getting more negative. Angular acceleration points out of the page (negative angular acceleration). Consider a wheel rotating clockwise and slowing down. Angular velocity is negative and its getting less negative. Angular acceleration points out of the page (positive angular acceleration). Solid body rotation: all parts have the same angular displacement/velocity/acceleration. Wheel has angular velocity ( ). The distance a particle travels is equivalent to the arc length : If r and are constant we have uniform circular motion and ac= v 2 r.
