On the bench Zhukovsky man sits and holds on extended

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Uploaded: 13.01.2014
Content: 10074.tif (40,64 kB)
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On the bench sits a man Zhukovsky and keeps at arm's length weights 5 kg each. The distance from each weight to the axis of the bench 70 cm. Bench rotates at 1 ^ -1. How will the speed of the bench, and what kind of work will make the person if he will tighten his hands, so that the distance from each axis of the weights to be reduced to 20 cm? The moment of inertia of the human and the seats (collectively) with respect to the axis 25 kg * m2.

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Task 10074. Detailed solution shorthand terms, formulas, laws used in the decision, the withdrawal of the calculation formula and the response.


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