Question 5 Use Mohr's Circle to answer this question. The state of plane stress at a point on a body is shown in Figure Q5. (a) Represent this stress state in terms of the principal stresses (3 marks) (b) Determine the orientation of the principal planes. (3 marks) (c) Draw a correctly oriented element showing the principal stresses acting on it. (4marks) (d) Represent this stress state in terms of the maximum in-plane shear stresses. (3 marks) act. (e) Determine the orientation of the planes on which the maximum in-plane shear stresses (3 marks) (f) Draw a correctly oriented element showing the maximum in-plane shear stresses and associated normal stresses acting on it. (4 marks) 20 MPa 60 MPa 90 MPa 90 MPa 60 MPa 20 MPa