For the stress block shown, what is OP2 if OP1 = 140 MPa (T)? A.60 MPa (T) 40 MPa B.60 MPa (C) C.20 MPa (C) D.20 MPa (T) Txy Which among the following is ALWAYS TRUE about the maximum in-plane shear stress? A.It acts on planes 450 from principal planes. B.It is equal to the absolute maximum shear stress. C.It is equal to the principal stress with higher magnitude. D.It acts on planes with zero normal stress. 120 MPa

3. For the given state of stress, determine the principal planes, the principal stresses, the max shear stress. You must use Mohr's Circle. 20 MPa 32 MPa 55 MPa

The state of stress at a point is the result of two loadings as shown in figure. When acting alone, the first loading produces the 3 MPa pure shear with respect of xy-axis. The second loading alone results in the 4 MPa pure shear with respect to the x'y-axis. The angle between the two sets of axis is 30° as shown. If the two loadings act simultaneously then resultant (absolute) shear stress at that point with respect to x-y axis is MPa (in integer). 3 MPa st 1 loading 2 loading 4 MPa α = 30° x'

Please do part 2 and 3 thank you