$2\mathrm{.}6-17$ Aeting on the sides of a stress element cu

from a bar in uniaxial stress are tensile stresses of

$10,000$ and $5000$ psi $,$ as shown in the figure.

$($a$)$ Determine the angle $$ and the shear stress ${}_{},$

and show all stresses on a sketch of the element.

$($b$)$ Determine the maximum normal stress ${}_{\text{m}\text{a}\text{x}}$ and

the maximum shear stress ${}_{\text{m}\text{a}\text{x}}$ in the material.

$5000$ psi