1. The problem statement, all variables and given/known data A ring of mass M hangs from a thread, and two beads of mass m slide on it without friction. The beads are released simultaneously from the top of the ring and slide down opposite sides. Show that the ring will start to rise if m > 3M/2, and find the angle at which this occurs. 2. Relevant equations F = ma Kinetic/potential energy 3. The attempt at a solution The ring is supposed to rise when the Normal force overcomes the gravitational force on the ring, but how is the Normal force supposed to point directly upward? There is no component of the Normal force that goes up.