Show that the system of momenta for a rigid body in plane motion reduces to a single vector, and express the distance from the mass center G to the line of action of this vector in terms of the centroidal radius of gyration k of the body, the magnitude v of the velocity of G, and the angular velocity w.

Show that the system of momenta for a rigid body in plane motion reduces to a single vector, and express the distance from the mass center G to the line of action of this vector in terms of the centroidal radius of gyration k of the body, the magnitude v of the velocity of G, and the angular velocity w.