• Card 13 / 36: Which of the following represents the area moment of inertia of a thin, rectangular body about an axis through the center of the body and parallel to the long dimension of the rectangle? The long dimension of the rectangle is 10 cm and the short dimension is 5 cm.
    A) 1.0 x 10 -6 m 4
    B) 1.0 x 10 2 m 4
    C) 1.0 x 10 -4 m 4
    D) 1.0 x 10 -6 m 2
    E) 2.0 x 10 -5 m 4

    Answer:
    A) 1.0 x 10 -6 m 4

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Explanation:

You may calculate this answer by remembering or looking up the formula for the geometry (I = bh3/12) where b is the long side parallel to the axis and b is the short side, or by deriving this equation from the discussion in section 2.1.1. You may wish to review that derivation.

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Mechanics I ME102

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Attribution:  Stephanie Redfern, Ranjeet (Ron) Agarwala, and Dr. Steve Gibbs. Mechanics I. The Saylor Academy 2014, http://www.saylor.org/courses/me102/
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