Three solid cylindrical rods are welded together to form the compound axial member shown in the figure. The compound axial Part $2$

Similar to the previous step, find the relationship between ${}_2,$ the elongation of rod $(2),$ and the internal tensile force, $F_2,$ in rod

$(2).$ Assume ${}_2$ is a positive value in units of mm and $F_2$ is a positive value in units of $kN.$ So$,$ the answer you enter for the ratio $($

$\frac{{}_2}{F_2})$ must be in units of $(m\frac{m}{k}N).$

$\frac{{}_2}{F_2}=$

$m\frac{m}{k}N$

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Attempts: unlimited

Part $3$

Similar to the previous step, find the relationship between ${}_3,$ the elongation of rod $(2),$ and the internal tensile force, $F_3,$ in rod

$(2).$ Assume ${}_3$ is a positive value in units of $mm$ and $F_3$ is a positive value in units of $kN.$ So$,$ the answer you enter for the ratio $($

$\frac{{}_3}{F_3})$ must be in units of $(m\frac{m}{k}N).$

$\frac{{}_3}{F_3}=m\frac{m}{k}N$

eTextbook and Media

Attempts: unlimited

Part $4$

Part $5$

What magnitude of external load $P$ is needed to displace end $D$ a distance of $u_D=70mm$ to the right?

$P=1$

member is attached to a fixed support at $A.$ Each rod has an elastic modulus of $E=37$GPa. Use the following values for the rod

lengths and areas: $L_1=1430mm,L_2=1750mm,L_3=1250mm,A_1=225m{m}^2,A_2=120m{m}^2,$ and $A_3=45m{m}^2.$ What

magnitude of external load $P$ is needed to displace end $D$ a distance of $u_D=70mm$ to the right?

Part $1$

There is a simple relationship for a rod in tension between the elongation, the tensile force, the length, the cross$-$

sectional area, and the modulus of elasticity.

Find the relationship between ${}_1,$ the elongation of rod $(1),$ and the internal tensile force, $F_1,$ in rod $(1).$ Assume ${}_1$ is a positive

value in units of $mm$ and $F_1$ is a positive value in units of $kN.$ So$,$ the answer you enter for the ratio $(\frac{{}_1}{F_1})$ must be in units of $($

$m\frac{m}{k}N).$

$\frac{{}_1}{F_1}=$

$m\frac{m}{k}N$