Problem $4$

Given the following Mohr's circle and Knowing that the orientation of the principal stress plan is $10\mathrm{.}9$ c$.$c$.$w$.$ from the original plane. Answer the following questions:

$1-$ Draw the original stress state and indicate which points represent it on Mohr's circle.

$2-$ Draw the principal stress element and specify its orientation.

$3-$ Draw the maximum in$-$plane shear stress state and specify its orientation.

$4-$ Calculate and draw the equivalent stress state if the original element is rotated $30$ c$.$c$.$w$.$

$5-$ What are the values of the variables $,$ and Z