(Solved): A steel bar with dimensions and cross-section shown is suspended vertically. The concentric downwar ...

A steel bar with dimensions and cross-section shown is suspended vertically. The concentric downward loads are applied to the bar: $22250\mathrm{N}$ at the lower end, $13500\mathrm{N}$ at $0.35\mathrm{m}$ above the lower end, and $9000\mathrm{N}$ at $1\mathrm{m}$ above the lower end. The modulus of elasticity of the steel is $210\mathrm{GPa}$. What is the total change in length of the bar?