3. Las coordenadas cartesianas de un punto en un círculo son (-1.5 m, 4.0 m). ¿Qué coordenadas polares (r, ) tiene ese punto? 4. Las coordenadas polares de un punto son (6.2 m, 80°). ¿Qué coordenadas cartesianas tiene el punto?

Two masses are connected by a rope that hangs over a pulley as shown below. the pulley is a uniform cylinder of radius 푅=0.381meters and mass 푀=3.1푘푔. initially 푚"is on the ground and 푚#rests 2.5 meters above the ground. if the system is released, use conservation of energy to determine the speed of 푚#just before it strikes the ground. assume the pulley bearing is frictionless.