The book covers stress and strain definitions, tensile and compressive stresses, shear stresses, temperature stresses, and related problems. It also explores stress-strain diagrams for ductile and brittle materials, concepts such as the elastic limit, Hooke's law, modulus of rigidity and bulk modulus. This book includes bars of Uniform sections, Bars of varying sections, an equivalent area of the compound section, Problems based on lateral strain and Poisson's ratio, the volumetric strain of cylindrical rod, and problems based on it. It contains over 50 problems to help readers grasp these concepts.