Given an element with stresses as indicated in figure below, find the following: a) The maximum and minimum principal stresses b) The maximum shear stress, and the average normal stress c) The inclination of the element in each case. d) Use Mohr's Circle (Graphical Solution) to prove your answers. e) Determine also the stress components acting on the inclined plane AB using method of equilibrium.

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Solid Mechanics

Engineering mechanics is a branch of science that deals with forces causing bulk motion in bodies and the effect that these forces cause on the bodies. Engineering mechanics does not deal with the internal changes that occur on account of these external forces. The internal effects in a body or a material under the action of external forces are studied in a new branch of science called solid mechanics, the strength of materials, or the mechanical behavior of engineering materials.