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A yo-yo is made of two uniform disks, each of mass M = 140 g and radius R= 2.1 cm, which are glued to a smaller central axle of negligible mass and radius R/2 (see figure). A string is wrapped tightly around the axle. The yo-yo is then released from rest and allowed to drop downwards, as the string unwinds without slipping from the central axle. Side view R . 受。 R/2 R/2 M IM D Calculate the angular speed of the yo-yo. in revolutions per second, when it has dropped a distance of 0.58 m. rev/s