Mechanics of materials also known as strength of materials is the branch of solid mechanics /continuum mechanics, which deals with the study/behaviour of deformable bodies. Mechanics of materials is fundamental subject in mechanical/civil engineering and has also specific application in many other areas such as in health care/medical to understand the anatomy of living beings, dental prostheses and surgical implants. This basic study will be helpful for advance topics of solid mechanics such theory of elasticity, theory of plasticity, fatigue and fracture mechanics which deals with the initiation and propagation of cracks in solid materials. Thus, attending this course mechanical and civil engineers will gain theoretical knowledge of mechanics of materials and solve solid/structural problems adopting appropriate theory and formulas while solving solid/structural mechanics problems.