Elasticity- Online Physics Notes for Class 11

Elasticity- Online Physics Notes for Class 11

Class 11 Physics: Elasticity is that property of a body by that it experiences a amendment in size or form whenever a deforming force acts on the body. once the force is removed the body returns to its original size and form. the general public square measure aware of the stretching of a elastic device. All materials, however, have this same elastic property, however in most materials, it's not therefore pronounced. the reason of the elastic property of solids is found in AN atomic description of a solid. Most solids square measure composed of a really sizable amount of atoms or molecules organized in an exceedingly mounted pattern referred to as the lattice structure of a solid.

Lattice structure of solid.

These atoms or molecules area unit command in their positions by electrical forces. The electrical force between the molecules is enticing and tends to tug the molecules along. Thus, the solid resist being force apart. anybody molecule in figure one has a pretty force actuation it to the correct Associate in Nursingd an equal force actuation it to the left. There are equal enticing forces actuation the molecule up and down, and in and out. A force between the molecules additionally tends to repel the molecules if they get too close. this can be why solids area unit tough to compress. to clarify this force we'd ought to invoke the Wolfgang Pauli Pauli exclusion principle of quantum physics. however here we tend to merely talk to of these forces as molecular forces.

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