Chapter 11.4, Problem 11.4TYU

A copper rod of cross-sectional area 0.500 cm² and length 1.00 m is elongated by 2.00 × 10⁻² mm, and a steel rod of the same cross-sectional area but 0.100 m in length is elongated by 2.00 × 10⁻³ mm. (a) Which rod has greater tensile strain? (i) The copper rod; (ii) the steel rod; (iii) the strain is the same for both. (b) Which rod is under greater tensile stress? (i) The copper rod; (ii) the steel rod; (iii) the stress is the same for both.