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The Stiffness of a Beam of Rectangular Cross Section Is

Question 563

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The stiffness of a beam of rectangular cross section is proportional to the product xy3. Find the stiffest beam which can be cut from a log with diameter d = 14 inches. See figure on right. The stiffness of a beam of rectangular cross section is proportional to the product xy<sup>3</sup>. Find the stiffest beam which can be cut from a log with diameter d = 14 inches. See figure on right.

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S = kxy3 and from the figure, x...

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