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The pinned-free be am of Problem is restrained by a spring of torsion al stiffness K lb. in./rad at the pin, as shown in Figure.

Choose the numerical value of K so that under its static weight, the be am rotates 1/10 rad, and make the calculations as in Problem.

(Use one and two elements and let 5mg/³ /EI = 1.0.)

2242_torsion al stiffness.jpg

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