A yo-yo-shaped device mounted on a horizontal frictionless axis is used to lift

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A yo-yo-shaped device mounted on a horizontal frictionless axis is used to lift a 28 kg box as shown in Fig. 10-52. The outer radius R of the device is 0.59 m, and the radius r of the hub is 0.29 m. When a constant horizontal force app of magnitude 180 N is applied to a rope wrapped around the outside of the device, the box, which is suspended from a rope wrapped around the hub, has an upward acceleration of magnitude 0.61 m/s2. What is the rotational inertia of the device about its axis of rotation?

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