What is the extension in the length of a steel wire of length 10 m...

What is the extension in the length of a steel wire of length 10 m and radius 0.1 cm, with a mass of 25 kg hanging from its free end? (Assume lateral strains << longitudinal strains and the density of steel is 7860 kg m^–3with Young’s modulus Y=2×10¹¹Nm^–2.)

Options

A2×10^-3m
B3×10^-3m
C4×10^-3m
D5×10^-3m

Correct answer

C. 4×10^-3m

Step-by-step solution

Correct Option is : (C)
4×10^-3m

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