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Thread: Rotation Bodies - moment of inertia of square sheet

  1. November 12th 2009, 01:27 PM #1
    jddery
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    Rotation Bodies - moment of inertia of square sheet

    A square sheet with a uniform density and total mass m is pivoted about an axis A in one corner of the sheet and perpendicular to the plane of the sheet as shown below. If the moment of inertia of the sheet about this axis is , what is the sheet's moment of inertia about a parallel axis, B, at the mid-point of one of its sides?

    Last edited by mr fantastic; November 17th 2009 at 03:10 PM. Reason: Changed post title
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  2. November 12th 2009, 03:50 PM #2
    skeeter
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    Quote Originally Posted by jddery View Post
    A square sheet with a uniform density and total mass m is pivoted about an axis A in one corner of the sheet and perpendicular to the plane of the sheet as shown below. If the moment of inertia of the sheet about this axis is , what is the sheet's moment of inertia about a parallel axis, B, at the mid-point of one of its sides?

    use the parallel axis theorem ...

    I = I_{cm} + md^2
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  3. November 12th 2009, 05:26 PM #3
    jddery
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    so with part of the equation md^2
    would I divid that by 2 to get the mid point
    and then solve for Icm ?
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