1.6 MPa y X 2. The grain of a wooden member forms an angle, B= 150, with the vertical, as shown to the right. For the stress state shown, determine (a) the normal stress 4 MPa 4 MPa perpendicular to the grain, and (b) the in-plane shear stress parallel to the grain. Ans: 0=-3.84 MPa, 7= -0.60 MPa B 1.6 MPa