15. Two thin horizontal disc rotates freely without fri

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15. Two thin horizontal disc rotates freely without friction in different directions around a common fixed vertical axis passing through the centers of the discs. Mass lower disc 4 times greater than the mass of the upper and lower range 2 times greater than the radius of the upper disc. The upper disc has fallen down, and both the drive of agglomerated, become rotate together in a direction in which the upper disc rotated with an angular velocity ω = 2 rad / sec. The lower disk to fall rotated with an angular velocity ωn = 0.5 rad / s. What is the angular velocity of the upper disk to ωV before the fall?

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


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