A steel specimen is subjected to elastic stresses represented by the matrix σij=⎣2 −3 1
−3 4 5 1 5 −1]MPa
Given that E = 200 GPa,
ν = 0.3, calculate the corresponding strains

Consider the transfer function for a first-order system g(s)=12(s+7)/(s^2+2s+9) for this system determine: a) poles and zeros of the function, b) the natural frequency and damping ratio, c) the peak value achieved in response to a unit step input, d) the peak time for a unit step input, e) the steady-state system response to a unit step input