3. A rigid bar ABCD is supported by two bars as shown in Figure below. There is no strain in the vertical bars before load P is applied. After load P is applied, the normal strain in bar (1) is 590 µ. Determine: a. The normal strain in bar (2). b. The normal strain in bar (2) if there is a 1 mm gap in the connection at pin C before the load is applied. c. The normal strain in bar (2) if there is a 1 mm gap in the connection at pin B before the load is applied. (2) 1.500 mm 240 mm 140 mm 465mm Rigid bar 900 mm (1)

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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).