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MMLU / What is true about the rotation of a solid disk?

Problem

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question

What is true about the rotation of a solid disk?

choices

  1. The velocity is the same on every point on the disk
  2. The part closer to the axis has a longer period
  3. The period of rotation is the same on every point on the disk
  4. The part closer to the axis has a shorter period

subject

astronomy

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Source and history

Official source

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