A wheel A is connected to another wheel B via an inextensible string that passes over a pulley C, which rotates around a fixed horizontal axle O. The system is initially at rest. Wheel A rolls down the inclined plane OP, pulling wheel B upward along the inclined plane OQ. Calculate the velocity (in m/s) of the axle of wheel A after it has moved a distance of s = 3.5 m down the incline. Both the wheels and the pulley are homogeneous disks with identical weights and radii. The weight of the string can be ignored.