A structural steel rod has a radius of 10 mm and length of 1.0m. A 100 kN force stretches it along its length Young's modulus of structural steel is `2xx 10^(11) Nm^(-2)`
The percentage strain is about

Options

A. `0.16% `
B. `0.32%`
C. `0.24%`
D. `0.08% `

Answer

A

Explanation

`"Strain" = (l)/(L) =(F )/(AY) = (10^(5))/(pi xx 10^(-4) xx 2 xx 10^(11)) = 1.59 xx 10^(-3)`
% strain = 0.159 % `~~ 0.16 %`