The extruded plastic shape will be subjected to an internal shear force of V = 395 lb. Dimensions of the cross are b = 1.0 in., d = 2.0 in., c = 1.4 in., and t = 0.10 in. Determine: (a) the magnitude of the horizontal shear stress at points A and B. (b) the magnitude of the horizontal shear stress at point C, which is located at a distance of yc = 0.7 in. below centroidal axis. (c) the magnitude of the maximum horizontal shear stress in the extrusion.

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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.