6. You are whirling a rubber stopper of mass m, attached to a string, in a vertical circle at a high constant speed. At the top of the circle, the net force that causes acceleration is .. horizontal and greater in magnitude than mg. horizontal and lower in magnitude than mg- vertically downward and greater in magnitude than mg. vertically downward and lower in magnitude than mg. a) b) c) d).

6. You are whirling a rubber stopper of mass m, attached to a string, in a vertical circle at a high constant speed. At the top of the circle, the net force that causes acceleration is .. horizontal and greater in magnitude than mg. horizontal and lower in magnitude than mg- vertically downward and greater in magnitude than mg. vertically downward and lower in magnitude than mg. a) b) c) d).