In an automatic clothes dryer, a hollow cylinder moves the clothes on a vertical circle (radius=0.32m). The appliance is designed so that the clothes tumble gently as they dry. This means that when a piece of clothing reaches an angle? Above the horizontal, it loses contact with the wall of the cylinder and falls onto the clothes below. How many revolutions per second must the cylinder make in order that the clothes lose contact by the wall when? = 70°?