At a point in a stressed body there are normal stresses of 0.5 N/mm2 (tensile) on a vertical plane and 0.4 N/mm2 (tensile) on a horizontal plane. The shearing stresses on these planes are zero. Determine the normal stresses on a plane making an angle 30° with the vertical plane.
1
0.675 N/mm2
2
0.525 N/mm2
3
0.475 N/mm2
4
0.325 N/mm2