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Friction

Friction is a crucial force that provides resistance when surfaces move against each other, enabling everyday activities like walking and driving. It arises from microscopic irregularities on surfaces and acts in the opposite direction of motion, with its strength determined by the nature of the surfaces and the normal force between them. The relationship between these factors is expressed by the equation F = μN, where μ represents the coefficient of friction, which varies across different materials.

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3 views1 page

Friction

Friction is a crucial force that provides resistance when surfaces move against each other, enabling everyday activities like walking and driving. It arises from microscopic irregularities on surfaces and acts in the opposite direction of motion, with its strength determined by the nature of the surfaces and the normal force between them. The relationship between these factors is expressed by the equation F = μN, where μ represents the coefficient of friction, which varies across different materials.

Uploaded by

paridhiagarwal129
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Friction is one of the most common yet least noticed forces in the universe.

It is the
resistance that one surface or object encounters when moving over another. Every
time you walk, write, or even breathe, friction is quietly at work. Without it, you would
slip with every step, cars could not stop, and even a nail would not stay in a wall.
Though often called a “force of opposition,” friction is not an enemy; it is a
companion that makes life on Earth functional and safe. Understanding friction helps
us explain motion, design machines, and create technologies that make daily living
easier.Scientifically, friction occurs when microscopic bumps and irregularities
between two surfaces come into contact. Even the smoothest materials, when viewed
under a microscope, are filled with tiny ridges. As these ridges collide and interlock,
they resist movement — that resistance is friction. It acts in the opposite direction of
motion. The force of friction depends mainly on two factors: the nature of the
surfaces and the normal force pressing them together. This relationship is
summarized by the equation F = μN, where F is the frictional force, μ (mu) is the
coefficient of friction, and N is the normal force. The coefficient of friction varies for
different materials — rubber on concrete has a high value, while ice on steel has a low
one.

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