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Unformatted text preview: 1 Physics 1D03 5 Angular Momentum Angular Momentum Angular momentum of rigid bodies Newtons 2 nd Law for rotational motion Torques and angular momentum in 3-D Text sections 11.2 - 11.4 Practice Problems: Chapter 11, problems 11, 21, 25, 27, 35 Physics 1D03 6 Angular momentum is the rotational analogue of linear momentum. Recall linear momentum: for a particle, p = m v . Newtons 2 nd Law: The net external force on a particle is equal to the rate of change of its momentum. dt d external p F = m I v F p L (angular momentum) To get the corresponding angular relations for a rigid body, replace: 2 Physics 1D03 7 Angular momentum of a rotating body: Angular momentum, L , is the product of the moment of inertia and the angular velocity. Units: kg m 2 /s (no special name). Newtons 2 nd Law for rotation: the torque due to external forces is equal to the rate of change of L....
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