Worlds of David Darling
Encyclopedia of Science
   
Home > Encyclopedia of Science

angular acceleration




Angular acceleration is the rate of change of angular velocity. The average angular acceleration of an object whose angular velocity changes from ω1 to ω2 over time t is (ω2 - ω1)/t. Instantaneous acceleration is the value approached as t becomes small. The direction of the angular acceleration vector is perpendicular to the plane of motion. The tangential acceleration aT of a particle at a distance r from a fixed point is , where α is its angular acceleration.


Related entry

   • acceleration


Related category

   • CLASSICAL MECHANICS