FRICTION: All You Need To Know


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The force preventing sliding against one another of solid substrates, fluids layers, and material components is known as friction.   There are various kinds of friction like:

  • Dry friction is a force that prevents two solid surfaces from moving laterally relative to one another. Dry friction is further separated into kinetic friction between moving components and static friction (sometimes known as “stiction”) between non-moving surfaces. Dry friction typically results from a complex interaction of surface characteristics known as asperities, with the exception of atoms or molecules friction 
  • • Lubricated friction occurs when a lubricating fluid splits two solid surfaces, and it is a type of fluid friction.
  • • Skin friction is a factor in drag, which is the force preventing a fluid from moving smoothly across a body’s surface.
  • Inner friction is the force preventing motion among the constituent parts of a solid substance as it deforms.

Friction between two surfaces causes kinetic energy from moving surfaces to be converted into thermal radiation a s demonstrated by the utilization of friction produced by rubbing wood together to start a fire, this feature can have dramatic effects. Every time there is motion with friction, such as when a thick fluid is agitated, kinetic energy is transformed into thermal energy. Wear is a significant side effect of several types of friction that can result in deteriorated performance or component damage. The discipline of tribology includes friction.

In order to provide traction and facilitate movement on ground, friction is both desired and crucial. For acceleration, deceleration, and direction changes, all land vehicles rely on friction. Accidents and loss of control can result from abrupt traction reductions.

 Inter-surface adhesion, surface quality, surface deformation, and surface pollution all contribute to dry friction. Because of the intricacy of these interactions, it is impractical to calculate friction from first principles, hence empirical approaches must be used for analysis and theory building.

Always, friction is a necessary evil. It might be helpful in some circumstances, but it could also be detrimental in others. Let’s examine friction’s benefits and drawbacks using some specific situations.


We Can Walk, Turn, And Stop Thanks To Friction.

Walking is tough without friction. We are propelled forward by a force coming from behind us thanks to friction. You may have observed that walking on sand dunes or slippery surfaces is particularly challenging.

In order to turn, friction gives us control. Manure is easily allowed by the resistive force. Consider roller skates; the minimal amount of friction provided by the wheels makes it challenging to turn.

Friction is the basis for how brakes in an automobile operate. An object won’t remain at rest on its own without friction, then. According to Newton’s first law, unless an outside force acts upon an object in motion, it will continue to move in a straight line.

Friction Is Required to Wear A Cap, Ring, And Belt.

Every time we have a cap, hat, or other item on, it must attach to us. Adhesives are the only thing that can make it work. However, friction contact enables attachment to us without the need for adhesives. Without resistance, things like our caps and the rings on our fingers will glide off.

Friction Aids in The Energy Transmission Process.

The friction that occurs between machine elements aids in the energy transfer in mechanical engineering. Without friction, the components will slide around and no firm contact will be made to transfer energy.

Fire Is Fueled By Friction

Due to friction, two bodies rubbing each other generate heat. Making fires out of dry tree branches and stones has long been done in this manner. A matchstick can also be lit thanks to frictional force. Watching this simulation will help you comprehend.

Friction Aids in The Retention of Items

We can grasp onto an object because of the friction between your hands and the thing. Just picture the object slipping off your hands without any resistance.

Non-Benefits of Friction

Creates Unwelcome Heat

It is vital to have friction. As a result, the heat we addressed in the positives section may occasionally be a drawback. Forest fires caused by dry trees rubbing against one another or any industrial fire disaster are examples of this unwelcome heat.

Machines’ Efficiency Is Decreased

Numerous tiny elements are working inside the machines, which are the cars’ engines. Typically, these components are constantly moving and coming into touch. The parts’ restricted motion is caused by friction, which lowers the machine’s overall effectiveness. The overall efficiency drop results in increased fuel usage.


Friction decreases efficiency and increases fuel consumption. Environmental risks result from this excessive fuel use.

Makes Obnoxious Noise

Heat and noise are two characteristics of friction. This noise may occasionally become pollution. When a balloon makes screaming noises when you rub it, you can probably guess what it feels like.

Causes Deterioration

Wear and tear are always a result of friction. Because it shortens an object’s lifespan, it raises more financial issues. If not for the influence of environmental elements like heat or rain, items would remain in place without friction for a very long time.

Advantages of Friction

  • • The friction between paper and the pencil allows us to write on items. A few graphite atoms split and adhere to the paper as a result of the friction.
  • • Items can be sharpened by us. We can grind or sharpen items by using the friction between two moving objects.
  • • Asteroids that impact the Earth’s surface burn up because of friction with the atmosphere. The asteroids’ heating effect is brought on by friction.

Disadvantages of Friction

  • • It’s challenging to keep surfaces clean. In particular circumstances, the friction between dust and surfaces can become very high. To clean such surfaces, specialized cleaning solutions are needed.
  • • Friction slows down motion. Because of this, the elevated design of maglev trains helps to minimize friction. To learn how to lessen friction, read this article.
  • • Friction entails costs. Friction reduces a vehicle’s mileage, increasing our fuel consumption. Additionally, there is investment in the development of vehicles and machinery with less friction. In addition, we use chemicals and oils to lessen friction.



That’s basically all there is to know about friction. It’s a great force that both runs our world and also impedes construction growth. But it’s an awesome force anyways.

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