three vertical, parallel straight rods, each 2.6m in length have their upper ends firmly secured and their lower supporting a rigid horizontal bar with a weight of 8KN, which causes the same elogation in each rod whilst the bar remains horizontal all the time. the cross sectional areas are 16mm2 for the steel, 36mm2 for copper and 16mm2 for the third rod. this copper rod elogated by 24mm when subjected to a load of 14KN over a length of 2.6m
given Ecopper 100Gpa, Esteel 200Gpa
Calculate. the load carried by each rod due to the 8KN horizontal bar.
the total elogation of the system.