Oblique Plane (25 pt.) The block shown has a 200 x 100 mm rectangular cross section. The normal stress on plane AB is 12 MPa in compression when a load, P is applied. If the angle of plane AB is = 36°, determine (a) the allowable load, P and (b) the shearing stress on plane AB. HINT: Reread the problem carefully! P A 200 mm B