When an axial load is applied to the ends of the bar shown in the figure, the total elongation of the bar between joints A and C is 0.15 in. In segment (2), the normal strain is measured as 1,250 pin./in. Assume L₁= 32 in. and L2 = 97 in. Determine (a) the elongation of segment (2). (b) the normal strain in segment (1) of the bar. Answers: (a) in. = (b) ₁ = (1) L₁ i B L2 in. pin./in. P

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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.