Civil Engineering MCQAE Level Civil Engineering
A steel rod 1.5 m long (E = 200 GPa) is subjected to a tensile stress of 120 MPa. The extension is:
Strength of MaterialsElongationEASY
Choose the correct answer
A
0.3 mm
B
0.6 mm
C
0.9 mm
D
1.2 mm
Correct Answer
C. 0.9 mm
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ε = σ/E = 120/200,000 = 6×10⁻⁴; δ = εL = 6×10⁻⁴×1500 = 0.9 mm
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