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229_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

229_Mechanics SolutionInstructors_Sol.Manual-Mechanics_Materials_7e.book_Gere_light.1

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SECTION 2.8 Impact Loading 223 Problem 2.8-14 A rigid bar AB having mass M 1.0 kg and length L 0.5 m is hinged at end A and supported at end B by a nylon cord BC (see figure). The cord has cross-sectional area A 30 mm 2 , length b 0.25 m, and modulus of elasticity E 2.1 GPa. If the bar is raised to its maximum height and then released, what is the maximum stress in the cord? A B C W b L Solution 2.8-14 Falling bar AB R IGID BAR : W Mg (1.0 kg)(9.81 m/s 2 ) 9.81 N L 0.5 m N YLON CORD : A 30 mm 2 b 0.25 m E 2.1 GPa
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