brass rod with a length of 1.40 m and a cross. sectional area of 2.00 square cm is fastened end to end to a nickel rod with length L and cross- sectional area 1.00 square cm. The compound rod is subjected to equal and opposite pulls of magnitude at its ends. 4.00 x104 N (a) Find the length L of the nickel rod if the elongations of the two rods are equal. (b) What is the stress in each rod? (c) What is the strain in each rod

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A: Answer: Normal stress,  σ =2.73×108 N/m2 Shear stress,  τ =1.51×108 N/m2

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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).