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Two disks are mounted on frictionless bearings on the same axle and can b brought together so that they can couple and rotate as one unit. Assume conservation of angular momentum holds. You need to convert rev/min into other units.
(a) The first disk, with rotational inertia 3.3 kg*m^2 about its central axis , is set spinning at +450 rev/min. The second disk, with rotational inertia 6.6 kg*m^2 about its central axis, is set spinnign at +900 rev/min. They then couple together. What is thier angular speed after coupling?
(b)If instead the second disk were spinning at -900 rev/min before coupling, what is the angular speed after coupling?
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