Consider a structure including the horizontal beam AB hinged to the wall at point A and supported by steel bar at point B, as shown. The length of the beam is L = 3.7 m and its weight is W = 450 N. The length of the steel bar is h = 2.5 m and its radius is r = 1.2 cm. The elastic modulus of the steel bar is E = 200 GPa. (a) Draw the free body diagram (FBD) of the horizontal beam AB ; (b) Draw the FBD of the steel bar;_Determine (c) the magnitude of the reaction force, RA, at point A; (d) the tensile stress, o, exerted by the beam on the steel bar; (e) the tensile strain, ɛ, developed in the steel bar B

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Mechanical Properties of Solids

There are three types of matter- solid, liquid and gas. Out of them, solids have a rigid shaped and size. The intermolecular forces of attractions in solids are greatest. Mechanical properties are the physical properties of a material which it shows, when it is provided with certain amount of force or load. These properties are to be kept in mind for various purposes. When a force is applied to an object, the object may or may not get deformed depending upon its elastic property. But every time the object develops a restoring force against the force applied. This is commonly known as stress. If the object changes its dimensions due to the force applied it develops strain ( which is the ratio of change in dimension to the original dimension).