A simply supported wood beam is subjected to point load P at mid-span. The stresses on element C are known to be x = XXXXXXXXXXMPa and t xy = XXXXXXXXXXMPa. Find the principal stresses on the element...

A simply supported wood beam is subjected to point load P at mid-span. The stresses on element C are known to be

_x
= - 0.634 MPa and t
_xy
= - 0.048 MPa. Find the principal stresses on the element and show them on a sketch of a properly oriented element.