[SOLVED] help- speed Mass m_1 on the frictionless table of the figure is connected by a string through a hole in the table to a hanging mass m_2. With what speed must m_1 rotate in a circle of radius r if m_2 is to remain hanging at rest? i know i am suppose to show what i have done, but i really have no idea how to start this problem. any help would be great. i know that weight( Fg) and tension are working on M2 and that Fg, tension, and normal force are working on M1.