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Question

A steel rod of length 1 m and cross-sectional area 1 × 10-5 m2 is subjected to a tensile force of 1000 N. If the Young's modulus of steel is 2 × 1011 N/m2, what is the strain produced?

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Explanation

Stress: Stress = F / A = 1000 / (1 × 10-5) = 1 × 108 N/m2. Young's modulus: Y = Stress / Strain. Strain: Strain = Stress / Y = (1 × 108) / (2 × 1011) = 5 × 10-4.

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