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Parallel Axis Theorem-Applied Maths

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  • 03-05-2010 9:47pm
    #1
    blacklionboy
    Registered Users Posts: 100 ✭✭


    Hi there,

    Im having trouble understanding one small part of the parallel axis theorem.

    It's to do with the distance between each tiny part of mass and the new axis.

    (r=distance from a tiny of part mass to axis running through COG)
    (D= The distance between the axes)

    The book says:
    "Take a piece of mass Delta M and let 'r' be its distance from the axis C(running through COG). (r-d) is therefore it's distance from the new axis"

    This is the part I don't understand. How is (r-d) the distance from the deltaM to the new axis? Been stuck on it for a while :confused:


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