A suructural steel rod has a radius of 10mm and a length of 1m. A 100 kN force stretches it along its length. Calculate (a) the stress (b) elongation, and (c ) percentage strain on the rod. Given that the Young's modulus of elasticity of structural steel is `2.0 xx 10^(11) Nm^(-2)`.

Explanation

To solve the problem step by step, we will calculate the stress, elongation, and percentage strain of the structural steel rod.

### Given Data:
- Radius of the rod, \( r = 10 \, \text{mm} = 10 \times 10^{-3} \, \text{m} = 10^{-2} \, \text{m} \)
- Length of the rod, \( L = 1 \, \text{m} \)
- Force applied, \( F = 100 \, \text{kN} = 100 \times 10^{3} \, \text{N} = 10^{5} \, \text{N} \)
- Young's modulus of elasticity, \( Y = 2.0 \times 10^{11} \, \text{N/m}^2 \)

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