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Sag in wire due to a weight (given the Young's modulus)
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[QUOTE="SteamKing, post: 5452976, member: 301881"] Your sag formula for the metal rod appears to be developed for a rod with a rectangular or square cross section, which is not the cross section of a typical steel wire. The wire is not going to be in bending; it supports the load by remaining in tension. You should analyze this problem from first principles by drawing a free body diagram showing the weight suspended between two supporting points. Without getting into catenaries and stuff, you can assume each part of the wire suspending the weight is straight. You want the tensile stress in each part of the wire to be less than the elastic limit, whatever that number is. [/QUOTE]
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Sag in wire due to a weight (given the Young's modulus)
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