PROBLEM 9.83 Determine the moments of inertia and the product of inertia of the L76 ×51 ×6.4-mm angle cross section of Problem 9.74 with respect to new centroidal axes obtained by rotating the xand y axes through o45 clockwise. SOLUTION From Problem 9.74 640.159610 mmxyI=−×From Figure 9.13 0.166xI=×0.453yINow ()10.30952xyII+=×10.14532−=−×Using Equations (9.18), (9.19), and (9.20)
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