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Homework Help: Moment of inertia

  1. Mar 1, 2005 #1
    does anyone know an easier way to determine which formula is used for calculating moment of inertia? i have all the formulas and descriptions, but i have trouble figuring out which formula to use based on what is given in the problem. any ideas thatll help me?
     
  2. jcsd
  3. Mar 1, 2005 #2

    dextercioby

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    If you have all the formulas,what are you asking for...?The expression for the tensor of inertia...?The definition of axial moment of inertia:
    [tex] I_{O}=:\int r^{2} \ dm [/tex]

    ,or what...?

    Daniel.
     
  4. Mar 1, 2005 #3

    HallsofIvy

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    What formulas do you mean?
     
  5. Mar 1, 2005 #4
    I mainly need to know how to determine the axis, and the difference between a hoop and a cylinder...mainly, (MR^2) and (1/2 MR^2)
     
  6. Mar 1, 2005 #5

    dextercioby

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    You're usually told which axis you rotate the object about.And yes,there are 2 more things:the theorem of Steiner and the integral calculus...
    Are u familiar with them ?

    Daniel.
     
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