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A steel rod, radius 10 mm, length 1.0 m, is pulled by 100 kN (Y = 2.0e11 Pa). Its elongation is about what?
A0.16 mm
B1.6 mm
C16 mm
D0.016 mm
Answer & Solution
Correct answer: B. 1.6 mm
Stress = 1e5 / (pi x 1e-4) = 3.18e8 Pa, so elongation = 3.18e8 x 1.0 / 2.0e11 = 1.59 mm.
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