Problem $2(40$ points$).$ For the given beam with a cowstaht EY$,$ ahswer the questiotis using Unte$-$load Mrethod:

Formula

$1*={\displaystyle \underset{0}{\overset{t}{}}}\frac{mM}{EI}dx$

$1*={\displaystyle \underset{0}{\overset{t}{}}}\frac{m_{}M}{EI}dx$

$($a$)[10$ points$]$ Mark the virtual load $($location and magnitude$)$ on the given space to calculate the slope angle at point $B,{}_B,$ using Unit$-$Load Method.

Virtual load to calculate the slope angle at point $B,{}_B$

$($b$)$ points