2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/57994The elastic string (rod) of a large mass M is considered, the left end of which is fixed to a body of a small mass m. The second body of mass m is fixed to the right end of the string. The force of the delta-function form is applied to the left side of the string. We find the propagation of a pulse in the system. The problem is related to the quark-string model of mesons.9 pagesMathematical Physicstext