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physics

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Find the diameter of an 18 m(L) long steel wire that will stretch no more than.009 m
AL when a load stress of 3800 N is hung on the end of the wire. The Young's Modulus for steel wire is 200 x 109 N/m2?

  • physics -

    delta L /L = tensile stress /E

    .009 / 18 = 3800/ [ 2*10^11 (pi r^2) ]

    solve for r then multiply by 2

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