At a point in a piece of elastic material direct stresses of 90 MN/m2 tensile and 50 MN/mZ compressive are applied on mutually perpendicular planes....

At a point in a piece of elastic material direct stresses of 90 MN/m2 tensile and 50 MN/mZcompressive are applied on mutually perpendicular planes. The planes are also subjected to ashear stress. If the greater principal stress is limited to 100MN/mZ tensile, determine:(a) the value of the shear stress;(b) the other principal stress;