A rod 120 cm long and of a diameter 3.0 cm is stretched by a force of 18 kN. What is its stress? a. 20. 70 N/mm^2 b. 25.47 N/mm^2 c. 245 N/mm^2 d. 2,470 N/mm^2

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Q: A rod, 120cm long and of diameter 3.0 cm is stretched by a force of 18 kN. What is its stress?

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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).