An axial pull of 1.5 kN is acting on a bar of consisting two equal lengths as shown but of diameter 10cm and 20 cm respectively. What will be the stresses in the two sections respectively in N/mm2?     A. 0.153 and 0.0036 B. 0.290 and 0.046 C. 0.190 and 0.0046 D.

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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).