Shear stress on the steel plate is given by
[tex] Stress = \frac{F}{A}[/tex]
[tex] Stress = \frac{9*10^5 }{0.10 * 0.10}[/tex]
[tex] Stress = 9 * 10^7 N/m^2[/tex]
now in order to find shear strain we can use
[tex]strain = \frac{stress}{shear modulus}[/tex]
shear modulus of steel is given by
[tex]\sigma = 78 * 10^9 N/m^2[/tex]
now by above formula we will have
[tex] strain = \frac{9 * 10^7}{78 * 10^9}[/tex]
[tex]strain = 1.15 * 10^{-3}[/tex]