2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/124304An effort has been made, in order to derive without "hard" mathematics, the forms of Schwarzschild, Lense-Thirring, Reissner-Nordstrom, Kerr and Kerr-Newman metrics.14 pages including front cover. New version includes reference to a so-called "wrong" (according to a referee of American Journal of Physics, to which I submitted a similar derivation) simplified derivation by Winterberg (2002), cited by Rabinowitz (2006). The derivation in the present paper is a different oneGeneral Physicstext