${\displaystyle \underset{?}{\overset{?}{}}}{f}_y=0$

$-225+72\mathrm{.}3+By=0$

$By=152\mathrm{.}7$

Q$-2)$ For the simply supported beam shown, determine the principal stresses and the maximum shear stress acting at point $H,$ as shown on Figs. a and $b.$ Show these stresses on an appropriate sketch.

${}_x={}_y=0,=\frac{VQ}{It},I=650\mathrm{.}603{10}^{-6}$

darr,$Q=yA$

$504\mathrm{.}5=225$

${\displaystyle \underset{?}{\overset{?}{}}}{M}_B=0$

$+2252\mathrm{.}25-Ay7$

$Ay=72\mathrm{.}3$