Posted by Elizabeth on Friday, November 30, 2012 at 4:16pm.
Multiply the length L of the cable by the strain, (deltaL)/L
You can get the strain from Hooke's law and Young's modulus of steel, E.
Young's Modulus for steel is
E = 2.0 x10^11 N/m2
Stress = Strain/E
Stress = 1070 N/(cable area)
Cable area = pi*r^2 = 0.7854 cm^2
= 7.854*10^-5 m^2
Stress = 1.362*10^7 N/m^2
Strain = 6.8*10^-5
Cable Length increase = 6.3*10^-4 m
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