A body is loaded elastically so that strain in y-direction (εy) = 0 and σz = 0. Take σx and σy as finite. What is the value of strain in z-direction (εz) in terms of stress in x-direction (σx), Young's Modulus (E), and Poisson's ratio (ν)?

This item consists of two statements, one labelled as 'Statement (I)' and the other as 'Statement (II)'. Examine these two statements carefully and select the correct answer. Statement (I): Any orthogonal set of axes are 180° to one another on Mohr's circle. Statement (II): The distance between these axes is half the diameter of the circle.

The stresses on two perpendicular planes through a point are 60 N/mm2 tension, 40 N/mm2 compression, and 30 N/mm2 shear. What is the absolute normal stress on a plane at 60° to that of the tensile stress?