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← HistoryWhich outcome increased when the Incan rope bridge's cable tension exceeded material yield strength?
A)Decreased bridge load capacity✓
B)Increased bridge natural frequency
C)Cable material elastic deformation
D)Improved cable thermal conductivity
💡 Explanation
Cable failure occurs primarily due to exceeding the material yield strength; plastic deformation leads to irreversible elongation via plastic deformation, because the stress surpasses the material's limit and causes permanent changes. Therefore, load capacity decreases exponentially, rather than frequencies increasing or elasticity being observed.
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