A strut and cable assembly ABC (see figure) supports a verticalload P = 18 kN. The cable has an effective cross-sectional area of 120 mm2, and the strut has an area of 250 mm2.
(a) Calculate the normal stresses σab and σbc in the cable and strut, and indicate whether they are tension or compression.
(b) If the cable elongates 1.3 mm, what is the strain?
(c) If the strut shortens 0.62 mm, what is the strain?
