Here is a problem just like class. Two $41cm$ steel plates $)$ bonded to a wood block

$(8$ cm wide by $20$ cm high, $E=10$GPa $)$ with an applied moment of $5kN-m.$ Find the maximum

bending stress in the wood and the steel $($note that the values of y in $M\frac{y}{\text{I}}$ are going to be

different. You can also use the "subtraction" method to get I for the transformed section$).$

Answers: I of the transformed section $=229\mathrm{.}87{10}^{-6}{m}^4,{}_w=2\mathrm{.}175$MPa,${}_s=47\mathrm{.}85$MPa.