8. Calcule la energia cinetica de un cuerpo de 40Kg que cae desde lo alto de un edificio de 200m cuando llega al suelo. Halle la energia potencial en la azotea de este cuerpo en la azotea del edificio. Calcule energia cinetica y potencial cuando ha caido los ¾ de su altura.

During the experiment if you could triple the breakaway magnetic force with all other quantities left unchanged, what is the new value for the critical velocity if it was v0 (initial velocity), initially? (b) now if you halved the radius with all other quantities left unchanged, what is the new critical velocity if it was v0 (initial velocity), initially? (c) if during the experiment, critical velocity quadrupled with all other quantities left unchanged, what is the new breakaway force if its magnitude was initially f0,?