Now imagine a piece of granite. 0000013206 00000 n On this page you can read or download chapter 5 elasticity physics target notes pdf in PDF format.

genius PHYSICS 6 Elasticity restoring forces bring the molecules of the solid to their respective equilibrium position (r = r 0) and hence the body regains its original form. If you don't see any interesting for you, use our search form on bottom ↓ . Elasticity If an external force is applied to a material, it causes deformation in molecular structure of that material. 0000007179 00000 n Some materials stretch and squash quite easily. The change in shape must surely occur, but to the unaided eye it's imperceptible. 0000001275 00000 n Some do not.The quantity that describes a material's response to stresses applied normal to opposite faces is called Young's modulus in honor of the English scientist Young's modulus is defined for all shapes and sizes by the same rule, but for convenience sake let's imagine a rod of length The same relation holds for forces in the opposite direction; that is, a strain that tries to shorten an object.Replace the adjective tensile with compressive. The proportionality constant k depends upon a number of factors for the material. If the deformation, or strain (the ratio of the change in length to the initial length), is 0000008407 00000 n %PDF-1.4 %���� In physics, elasticity (from Greek ἐλαστός "ductible") is the ability of a body to resist a distorting influence and to return to its original size and shape when that influence or force is removed. (6) Elastic limit : Elastic bodies show their property of elasticity upto a certain value of deforming force. This changes the volume of the object without changing its shape.The bulk modulus is a property of materials in any phase but it is more common to discuss the bulk modulus for solids than other materials. The SI unit of stress is the Which means that pascal is also the SI unit for all three moduli.Imagine a piece of dough. 0000006949 00000 n Rubber on the other hand, has a high Poisson's ratio (nearly 0.5). Elasticity is the property of solid materials to return to their original shape and size after the forces deforming them have been removed. This is the way Chinese hand-pulled noodles (The ratio of transverse strain to axial strain is known as The symbol that looks unfortunately like the Latin letter Typical values for Poisson's ratio range from 0.0 to 0.5. When a cork is pushed into a wine bottle, it gets shorter but not thicker. It gets longer and thinner. 0000014551 00000 n If you don't see any interesting for you, use our search form on bottom ↓ . Most likely we'd replace the word "extension" with the symbol (This is Hooke's law for a spring — a simple object that's essentially one-dimensional. 0000015455 00000 n 0000058113 00000 n When a rubber stopper is pushed into a chemical flask, the stopper gets shorter by some amount and wider by nearly half that amount. Gases have a bulk modulus that varies with initial pressure, which makes it more of a subject for thermodynamics — in particular the The SI unit of compressibility is the inverse pascal [Pa which can be translated literally into… As extension, so force. 0000011420 00000 n PM1: Elasticity 5 As the stress was further increased, a point Y, known as the yield point, at which the stress rapidly dropped, was reached. 0000012571 00000 n 0000011228 00000 n 0000013900 00000 n Contraction means to get shorter. Stretching a piece of dough makes it get thinner as well as longer. 0000010162 00000 n 0000058088 00000 n 0000016732 00000 n By removing this force, material turns its original shapes; we call this process as elasticity of material. Cork is an example of a material with a low Poisson's ratio (nearly zero). Download elasticity physics pdf document. 0000015170 00000 n On this page you can read or download elasticity physics 12th science download pdf in PDF format. Corks can be pounded into bottles with a mallet. 0000016153 00000 n Elasticity can be explained by the Hooke’s Law. The deformation that results is called shear strain. From J to K the material flowed like a fluid; such behaviour is called plastic flow. 0000040800 00000 n 1628 0 obj << /Linearized 1 /O 1630 /H [ 1354 5595 ] /L 2434737 /E 79992 /N 79 /T 2402057 >> endobj xref 1628 46 0000000016 00000 n It gets shorter and fatter. It is the ability of returning its original shape after removing the applied stress. Recall Hooke's law — first stated formally by Robert Hooke in The True Theory of Elasticity or Springiness (1676)… ut tensio, sic vis. Hooke's law can be generalized to…The coefficient that relates a particular type of stress to the strain that results is called an The international standard symbols for the moduli are derived from appropriate non-English words — Stresses on solids are always described as a force divided by an area. 0000011611 00000 n

0000012594 00000 n If you don't see any interesting for you, use our search form on bottom ↓ . Thicker nylon strings and ones made of steel stretch less for the same applied force, implying they have a larger k (see Figure 2). The normal force per area directed inward (Extension and contraction are opposite types of linear strain.

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