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Unformatted text preview: in a time interval t , its average angular velocity avg is (10-5) The (instantaneous) angular velocity of the body is (10-6) Both avg and are vectors, with directions given by the right-hand rule of Fig. 10-6. They are positive for counterclockwise rotation and negative for clockwise rotation. The magnitude of the body's angular velocity is the angular speed . Angular Acceleration If the angular velocity of a body changes from 1 to 2 in a time interval t = t 2- t 1 , the average angular acceleration avg of the body is (10-7) The (instantaneous) angular acceleration of the body is (10-8) Page 1 of 1 Review & Summary 12/23/2010 http://edugen.wiley.com/edugen/courses/crs4957/halliday9118/halliday9118c10/aGFsbGl. .....
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- Fall '07