Problem 1.244

The ends of thin threads tightly wound on the axle of radius \(r\) of the Maxwell disc are attached to a horizontal bar. When the disc unwinds, the bar is raised to keep the disc at the same height. The mass of the disc with the axle is equal to \(m\), the moment of inertia of the arrangement relative to its axis is \(I .\) Find the tension of each thread and the acceleration of the bar.