Problem # $7(20$ points$)$

For the cantilever beam shown below in which the left end is fixed and subjected to loading shown.

a$)$ Find the internal loadings at section $1-1$

b$)$ Calculate the state of stress at points A located at section $1-1.$ Show the state of stress on an element.

c$)$ Calculate the state of stress at points B located at section $1-1.$ Show the state of stress on an element.

The Moment of Inertia of the cross$-$section calculated around N$.$A$.$ is $I=4\mathrm{.}603{10}^{8}m{m}^4.$ Area of cross$-$section $=38803m{m}^2$

Section $1-1$

$14$