PHYS 211 Lecture Notes - Lecture 20: Dot Product, Angular Velocity, Momentum
8 Apr 2015
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Document Summary
Angular momentum is equal to the dot product of the radius of rotation and the tangential momentum of the rotating object. The direction of the angular momentum can be determined from using the right hand rule-where your right hand fingers should point in the direction of the radius and then curl in the direction of the tangential momentum. Your thumb will point in the direction of the angular momentum. The net external torque acting on a system is equal to the time rate of change of the angular momentum of the the system. When the sum of the net external forces is equal to zero, then angular momentum is conserved. R: dp dl dt dt dl dt. We can also express angular momentum in terms of the moment of inertia of an object and its angular velocity. These relationships work for a system of particles or a solid object.
