Hamilton Mcguire
09/07/2024 · High School
A crane is required to lift loads of up to \( 1.0 \times 10^{5} \mathrm{~N} \). (a) What is the minimum diameter of the steel cable that must be used? (b) If a cable of twice the minimum diameter is used and it is 8.0 m long when no load is present, how much longer is it when supporting a load of \( 1.0 \times 10^{5} \mathrm{~N} \) ? (Data for steel: \( E=2 \times 10^{11} \mathrm{~Pa} \), proportional limit \( =2.0 \times \) \( 10^{8} \mathrm{~Pa} \), elastic limit \( =3.0 \times 10^{8} \mathrm{~Pa} \), and tensile strength \( =5.0 \times 10^{8} \mathrm{~Pa} \).)
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(a) الحد الأدنى لقطر الكابل هو حوالي \( 2.52 \mathrm{~cm} \).
(b) الكابل سيكون أطول بمقدار \( 2.0 \mathrm{~mm} \) عند دعم الحمولة.
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