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Moments of Inertia in Physics

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2016-03-26 07:42:28
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Astrophysics For Dummies
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In physics, the moment of inertia measures how resistant an object is to changes in its rotational motion about a particular axis. Here are some of the most common moments of inertia:

  • Solid cylinder or disk of radius r rotating about its axis of symmetry:

    image0.png
  • Hollow cylinder of radius r rotating about its axis of symmetry:

    image1.png
  • Solid sphere of radius r rotating about its center:

    image2.png
  • Hollow sphere of radius r rotating about its center:

    image3.png
  • Thin rod of length r rotating about its middle:

    image4.png
  • Thin rod of length r rotating about one end:

    image5.png

About This Article

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About the book author:

Dr. Steven Holzner has written more than 40 books about physics and programming. He was a contributing editor at PC Magazine and was on the faculty at both MIT and Cornell. He has authored Dummies titles including Physics For Dummies and Physics Essentials For Dummies. Dr. Holzner received his PhD at Cornell.