$\text { A brass rod } ( E =110 \mathrm { GPa } ) \text { with a cross-sectional area of } 250 \mathrm {~mm} ^ { 2 } \text { is loaded by forces } P _ { 1 } = 15 \mathrm { kN }$ $P _ { 2 } = 10 \mathrm { kN }$, and $P _ { 3 } = 8 \mathrm { kN }$. Segment lengths of the bar are $a = 2.0 \mathrm {~m} , b = 0.75 \mathrm {~m}$, and $c = 1.2 \mathrm {~m}$. The change in length of the bar is approximately:
A) 0.9 mm
B) 1.6 mm
C) 2.1 mm
D) 3.4 mm

Question

$\text { A brass rod } ( E =110 \mathrm { GPa } ) \text { with a cross-sectional area of } 250 \mathrm {~mm} ^ { 2 } \text { is loaded by forces } P _ { 1 } = 15 \mathrm { kN }$ $P _ { 2 } = 10 \mathrm { kN }$, and $P _ { 3 } = 8 \mathrm { kN }$. Segment lengths of the bar are $a = 2.0 \mathrm {~m} , b = 0.75 \mathrm {~m}$, and $c = 1.2 \mathrm {~m}$. The change in length of the bar is approximately: 
A) 0.9 mm 
B) 1.6 mm 
C) 2.1 mm 
D) 3.4 mm

Quizplus · Accepted Answer

The Answer of $\text { A brass rod } ( E =110 \mathrm { GPa } ) \text { with a cross-sectional area of } 250 \mathrm {~mm} ^ { 2 } \text { is loaded by forces } P _ { 1 } = 15 \mathrm { kN }$ $P _ { 2 } = 10 \mathrm { kN }$, and $P _ { 3 } = 8 \mathrm { kN }$. Segment lengths of the bar are $a = 2.0 \mathrm {~m} , b = 0.75 \mathrm {~m}$, and $c = 1.2 \mathrm {~m}$. The change in length of the bar is approximately: 
A) 0.9 mm 
B) 1.6 mm 
C) 2.1 mm 
D) 3.4 mm

P2=10kNP _ { 2 } = 10 \mathrm { kN }P2​=10kN

$P _ { 2 } = 10 \mathrm { kN }$