What is their angular speed after coupling

Reference no: EM13668629

Two disks are mounted (like a merry-go-round) on low-friction bearings on the same axle and can be brought together so that they couple and rotate as one unit. The first disk, by rotational inertia 4.31 kg·m² about its central axis, is set spinning counter clockwise (which might be taken as the positive direction) at 125 rev/min. The second disk, with rotational inertia7.93 kg·m² about its central axis, is set spinning counter clockwise at 907 rev/min. They then couple together. (a) What is their angular speed (rev/min) after coupling? (b) If instead the second disk is set spinning clockwise at 907 rev/min, what is their angular velocity (in rev/min, using the correct sign for direction) after they couple together?

Reference no: EM13668629

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