One end of a brass wire 120 cm long and a diameter of 0.24 cm is fastened to a point in the ceiling. A body is hung weighing 32x105 dynes at the other end of the wire. The Young’s modulus of brass is 9x1011 dynes/cm2. Determine the strain of the wire. a. 7.856 x 10−2 b. 7.856 x 10−3 c. 7.856 x 10−4 d. 7.856 x 10−5

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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).