81. The ball weighing m = 100 g, attached to the end of

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Uploaded: 23.03.2014
Content: fiz005_81.doc (74 kB)

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81. The ball weighing m = 100 g, attached to the end of the thread length ℓ1 = 1 m revolves, based on a horizontal plane at a frequency n1 = 1 s-1. The thread is shortened, and the ball is close to the axis of rotation to a distance ℓ2 = 0,5 m. With what frequency n2 will then rotate the ball? And what kind of work will make the external force, shortening the thread? Friction ball on the plane ignored.

Additional information

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

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