A steel cantilever beam, of length 2L, has an l-section, see Figure Q3. The cantilever beam is under a uniformly distributed load q = 175 kN/m applied in its vertical plane of symmetry at OA part of the span. The yield strength of the steel is [a] = 440 MPa; the Young's modulus E = 250 GPa. L=1m and the coordinates of Point H are x= 0 mm, y = -80 mm, z= 0 mm. b) O d) L q A L Deflection - Rotation - B X Figure Q3 20mm 10mm H 20mm The von Mises equivalent stresses at point H can be calculated as a) The factors of safety predicted at point H by the maximum shear stress theory of failure (Tresca criterion) -220mm b 180mm c) The factors of safety at point H predicted by the maximum-distortion-energy theory (von Mises criterion) can be calculated as MPa By use of the virtual work method, determine the rotation and deflection at the end B. mm (Downward deflection is negative) x 10-3 radians (Positive rotation is in the anticlockwise direction)