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    Princesschizy's Avatar
    Princesschizy Posts: 1, Reputation: 1
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    #1

    Jun 26, 2014, 01:47 PM
    Solver physics
    Young modulus for steel is 2*10^12n/m^2 what extension will be produced in a steel wire of 1mm in diameter and 2.5m long by hanging a mass of 3 kg from it
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Jun 26, 2014, 01:55 PM
    Remember that extensional strain = Young's Modulus times tensile stress:



    For a simple bar under tension you have = Force/Area, and . Solve for .

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