A steel cable with nominal diameter 25 mm (see Table 2-1) is used in a construction yard to lift a bridge section weighing 38 kN, as shown in the figure. The cable has an effective modulus of elasticity E = 140 GPa.
(a) If the cable is 14 m long, how much will it stretch when the load is picked up?
(b) If the cable is rated for a maximum load of 70 kN, what is the factor of safety with respect to failure of the cable?