A particle is located on the surface of a conically-shaped part at the radius r = 0.2 m, as shown in Fig. 1, right. The part is rotating around the vertical axis at constant angular velocity . What is the minimum angular velocity @min about the vertical axis y for which the particle will remain on the surface without slipping? Assume the coefficient of static friction between the object and the surface to be = 0.3 and g = 9.8 m/s. www T 0 B T mg @ y r m 30 mg