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

    May 15, 2014, 07:46 AM
    Phsics- Elasticity
    Overall changes in volume and radii of a uniform cylindrical steel wire 0.2% and 0.002% respectively when subjected to some suitable force. Longitudinal tensile stress acting on the wire is?
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    May 15, 2014, 09:32 AM
    If the volume is increasing by 0.2%, and the radius is decreasing by 0.002%, that means the wire is stretching by about 0.24%, which is the strain () on the wire. Now you can use Hooke's Law of Elasticity and Young's modulus for steel to calculate the required stress to cause that strain: .
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