9. The horizontal platform mass m = 80 kg, and the radi

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9. The horizontal platform mass m = 80 kg, and the radius R = 1 m rotates at n1 = 20 rev / min. At the center of the platform is a person, and arranged to hold the hands of weight. With what frequency n2 will rotate the platform, if a person, his arms, reduce its moment of inertia of the J1 = 2,94 to J2 = 0,98 kg • m2? Read uniform drive platform.

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Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)


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