The two circular disks, each of mass \(m_{1}\), are connected by the curved bar bent into quarter-circular arcs and welded to the disks. The bar has a mass \(m_{2}\). The total mass of the assembly is \(m=2 m_{1}+m_{2}\). If the disks roll without slipping on a horizontal plane with a constant velocity \(v\) of the disk centers, determine the value of the friction force under each disk at the instant represented when the plane of the curved bar is horizontal.

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y v B A x