ï»¿ What is tensile stress? from Physics Mechanical Properties of Solids Class 11 Manipur Board

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Mechanical Properties of Solids

Physics Part II

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What is tensile stress?

When a body is stretched by two equal forces applied normal to its cross-sectional area, the dimension of the body is increased.The restoring force per unit area in this case is called tensile stress.

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What is the force of adhesion?

Adhesive force is the attractive force between two unlike molecules. They are caused by forces acting between two substances like electrostatic force (attraction due to opposing charges), mechanical force etc.

E.g., Force of attraction between gum and paper.

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What do you understand by intermolecular forces?

Intermolecular force is the force between the molecules of the substance is called intermolecular force.

There is a dipole-dipole interaction between the molecules.
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What is the force of cohesion?

Cohesive attraction or cohesive force is the force of attraction between same types of molecules sticking together.
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Define interatomic forces and give an example?

The force between atoms of the molecule is called interatomic force.

E.g.The nucleus and electron cloud of a molecule is binded by electrostatic force.
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What is the nature of inter-atomic or inter-molecular forces?

Inter-atomic or inter-molecular forces are electrostatic in nature.

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