Additional Problem $3$:

Using Mohr's circle determine the normal and shear stresses that act on plane AB of the inclined $\backslash (\backslash$left$(25^\{\backslash$circ$\}\backslash$right$.\backslash )$ from horizontal$)$ element shown below. In addition, draw a sketch of the triangular wedge on the right side of plane AB and show the normal and shear stresses that act on plane AB of that triangular wedge $($be sure to show the proper direction for the stress arrows you show on that plane$).$