Two flywheels in the form of disks of identical radii and masses were spun up to a rotation speed of 480 rpm and left to their own devices. Under the influence of the friction forces of the shafts on the bearings, the first stopped after 80 s, and the second made 240 revolutions before stopping. Which flywheel had a greater moment of friction between the shafts and bearings and by how many times?
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