2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/111144This dissertation aims at studying the braneworld models in the context proposed by Randall and Sundrum. The focus is on the spin-0 perturbations in the Kerr space-time as a 4-dimensional braneworld. The work deals the main aspects of Einstein General Relativity as well as perturbations of black holes metrics. We also review the Randall-Sundrum models and their motivations and attempts to describe braneworld black holes. In the end the Kerr-Randall-Sundrum black string scalar perturbation and superradiance are obtained.Master Degree Thesis (Advisor: Elcio Abdalla), 110 pages, 7 figures, in portugueseGeneral Relativity and Quantum Cosmologytext