40. Steel wire section S = 3 mm2 under a tensile force equal to F = 104 N ∙ 4 has a length L1 = 2 m. The absolute elongation of the wire with increasing tensile force on F1 = 104 N. Young´s modulus of steel E = 2 ∙ 1011 Pa.
Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)