# Chapter 12 – Friction

The following Topics and Sub-Topics are covered in this chapter and are available on MSVgo:

Introduction

There is certain evidence that some things occur in our lives daily, but have you ever imagined why and how this could happen? For example, a driver applies brakes to slow down a car at a traffic signal, but how does a car stop while brakes are applied? Why do we slip and fall while trying to walk on a wet floor or a banana peel? All of these happen because of friction. These are a few examples, but we face many such types of circumstances in our daily life. In this article, we will help you to find out the answers to such types of questions.

#### What is the definition of friction?

Friction is a force of opposition that one objects or surface experience while moving above another. Friction is a force but not a fundamental force like gravity. The force of friction resists the motions between moving objects or surfaces that are touching. Sometimes friction works for us and sometimes works against us. For example, if we feel cold, we can rub both hands together to create heat. On the contrary, slips on ice, wet floor, banana peel are some of the examples of friction that works against us. Moreover, friction is very functional and increasing and reducing friction is conditional to external factors.

#### What are the factors that affect friction?

Mainly, there are two factors affecting friction. These two factors are:

• Nature of two touching surfaces: Friction depends upon the roughness or smoothness of surfaces that are touching. The friction between the two objects will reduce if the surface is smooth because then interconnecting of irregularity will be less. But, friction will increase if the surface is rough.
• Force acting on these surfaces: Friction will increase when force is applied on the surfaces with the variations.

#### Friction: A necessary evil?

In some cases, the frictional force causes a lot of losses. Hence, we can say for a few cases, friction is a necessary evil. For example, fire in the forest is caused due to the friction between tree branches, unnecessary heat produced by friction may lead to energy wastage, and friction also slows down the motion of movement of an object as friction force acts in the opposite direction of motion.

#### Can wheels reduce friction?

Yes, wheels can reduce friction. Wheels reduce friction by allowing the touching surfaces to move by rolling instead of sliding or dragging over one another. And because of reducing friction, we can use less force on wheels to move the object.

#### What are the various types of friction?

Friction is divided into four types, and all these four frictions are different from one another:

• Sliding Friction
• Static Friction
• Fluid Friction
• Rolling Friction

Examples of the application of friction

Various examples of the application of friction are mentioned below:

• When matchsticks catch fire, it’s because of the application of friction.
• Friction between pen and chalk enables us to write on books and boards.
• As very little friction is present on ice, we find it difficult to walk on the surface of the ice.

#### FAQs

1. What is friction easy definition?
In simple words, friction can be defined as a resisting force that is generated when two hard surfaces skid against each other.

2. What are the 4 types of friction?
The 4 types of friction are Sliding Friction, Static Friction, Fluid Friction, and Rolling Friction.

3. What causes friction?
Friction is caused when the surface of two objects are touched with one another by joining irregularities.

4. What are 5 examples of friction?
The 5 examples of friction are:

• Rubbing our hands to generate heat.
• A child can slip down from a slide because of sliding friction.
• We can sledge a slide on snow.
• We can push an iron over the material.
• To push a washing machine across a floor is also because of friction.

5. What 2 factors affect friction?

The 2 factors that affect friction are:

• The types of surfaces, whether the two surfaces are smooth /rough or liquid.
• The amount of force given by the object or the weight of an object on the surface.

6. Does speed affect friction?

Yes, speed can affect friction as friction only happens by the interaction of two surfaces. The friction force of an object is higher when acceleration is higher.

Friction is a very important topic from Physics for 11th standard students. To know more about friction and its examples, you can download our MSVgo app. MSVgo is a video library app that explains the core subject with various examples. The interesting examples will help you to know the concept of friction in a more clear way. So, without any delay, download the MSVgo app on your mobile from the play store.

From the above definition and examples of friction, we have clearly understood that, in our daily life, we all have experienced friction. We can walk because of frictional force as friction holds our shoe to the floor while driving car friction between tyres and the roads can stop the car from slipping, etc. For some conditions, friction is good, while for some other conditions, friction can be harmful as we have already discussed above in this article.

### High School Physics

• Alternating Current
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• Dual nature of Radiation and Matter
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• Force And Laws Of Motion
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### High School Chemistry

• Acids, Bases and Salts
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• Absorption and Movement of Water in Plants
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• The Fundamental Unit Of Life
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### High School Math

• Algebra – Arithmatic Progressions
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### Middle School Science

• Acids, Bases And Salts
• Air and Its Constituents
• Basic Biology
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• Cell – Structure And Functions
• Changes Around Us
• Chemical Effects Of Electric Current
• Coal And Petroleum
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• Conservation Of Plants And Animals
• Crop Production And Management
• Electric Current And Its Effects
• Electricity And Circuits
• Elements and Compounds
• Fibre To Fabric
• Food production and management
• Force And Pressure
• Forests: Our Lifeline
• Friction
• Fun With Magnets
• Garbage In, Garbage Out
• Getting To Know Plants
• Health and Hygiene
• Heat
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• Life Processes: Nutrition in Animals and Plants
• Materials: Metals And Non-Metals
• Matter and Its States
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• Micro Organisms: Friend And Foe
• Motion And Measurement Of Distances
• Motion And Time
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• Our Environment
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• Reaching The Age Of Adolescence
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• Transfer of Heat
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• Universe
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• Water: A Precious Resource
• Weather, Climate And Adaptations Of Animals To Climate
• Winds, Storms And Cyclones

### Middle School Math

• Area and Its Boundary
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• Tenths and Hundredths
• Time