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A crane rope must not stretch past its yield strength. The minimum area A is given by what?
AA = M g x sigma_y
BA = M g / sigma_y
CA = sigma_y / M g
DA = M / sigma_y
Answer & Solution
Correct answer: B. A = M g / sigma_y
Stress Mg/A must not exceed the yield strength, so A must be at least Mg divided by sigma_y.
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