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[" 7.A "6kg" weight is fastened to the e...

[" 7.A "6kg" weight is fastened to the end of a steel wire of unstretched length "60cm" .It is whirled in a "],[" vertical circle and has an angular velocity of "2" revls at the bottom of the circle.The area of "],[" cross-section of the wire is "0.05cm^(2)" .Calculate the elongation of the wire when the weight is at "],[" the lowest point of the path.Young's modulus of steel "=2times10^(11)N/m^(2)" ."]

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