A cylindrical rod having a cross sectional area of 20 mm2 is pulled in a tension and this is the stress strain curve The Young's Modulus of the rod's material is 2.0 1.8 14 1.2 1.0 0.8- 0.4 100 200 300 400 s00 600 700 B00 900 1א) Sirmin Stress (GPa)

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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).