Angular Momentum of a Rigid Body: System of Particles and Newton's Second Law

This content defines the total angular momentum (L) of a rigid body as the vector sum of the angular momenta of its constituent particles. It then extends Newton's Second Law to rotational motion, stating that the net external torque on a system of particles equals the rate of change of the system's total angular momentum (τnet​=dL/dt). The lesson concludes by drawing parallels between translational and rotational equations, specifically highlighting that for a rigid body rotating about a fixed axis, L=Iω.