Friction: Advantages and Disadvantages Explained
Friction is one of the most important concepts of friction, and today we will learn what friction is and everything there is to know about it.
What Is Friction?
According to Britannica, Friction is the force that stops one solid item from sliding or rolling over another. Frictional forces, like the traction needed to walk without slipping, can be helpful, but they also make it very hard to move. About 20% of the power of a car’s engine is used to overcome friction in the moving parts.
Adhesion, which is the force of attraction between the contact areas of the surfaces, which are always microscopically uneven, is the main reason why metals experience friction. When you shear these “welded” joints, and when the imperfections of the harder surface plow across the softer surface, friction happens.
Key Concepts
• Advantages of friction
• Disadvantages of friction
Introduction to Friction in Daily Life
Friction force opposes or resists the relative motion between the two surfaces of objects in contact. It always acts in the direction opposite to that of the applied force or in the direction opposite to which an object moves or tries to move. It is a contact force. There are a few advantages and a few disadvantages of friction in daily life. In this session, we are going to list and explain each one of them.
Explanation:
Advantages of friction:
Friction can be increased by increasing the roughness of the surfaces in contact. This will increase the irregularities between the surfaces. It plays a very important role in our daily life. Without friction we are a handicap.
There are many advantages of friction. A few of them are:
- Fixing the nail in the wood or wall.
- A person can climb a mountain or trek because of the friction developed between the surface and the shoes.
- Riding a horse.
- Walking on any surface.
- Stopping vehicles on the roads when we want them to.
- Writing on paper.
- Holding any object using your hands.
- Asteroids burn in the atmosphere before reaching the earth due to friction and save lives on the Earth.
- Generate heat when we rub our hands during winter.
- Helpful in eating and drinking.
- Trains can run on the rails because of friction.
Disadvantages of friction:
Friction can be decreased by reducing the roughness of the surface in contact. This will decrease the irregularities between the surface but still, it cannot be made zero. Even though friction is very important in our daily life, it also has a few disadvantages.
There are many disadvantages of friction. A few of them are:
- It produces heat in various parts of the machine.
- It causes wear and tear of the machines.
- It causes moving objects to stop even if we do not want to.
- Stopping vehicles when it is not required.
- Wearing out of soles.
- Slows down the pace of motion as a frictional force acts in the opposite direction.
- Energy is wasted as a certain amount of energy is converted to heat energy, thus reducing the efficiency of the appliance or machine.
- Exerting more power in the machines.
- Wearing out tires.
- Opposing the motion of an object.
- Wearing out of stone steps.
- Automobile engines consume more fuel which is a money loss.
Ways to Increase or Decrease Friction
Ways to Increase Friction
- The vehicles have treaded tires to help them grip the road better.
- Football shoes include studs or grooves on the bottom to help them stay on the ground.
- Kabaddi player rubbing hands on sand to get a firmer grasp on the other person
- When you hit the brakes on a car, the breaking pads are harsh, which makes it hard to stop the car.
- To get a stronger grip, gymnasts put some rough stuff on their hands.
Ways to Reduce Friction
- Using things like powder, oil, and grease as lubricants
- To make it easier to slide, we spread the powder over a carrom board.
- To reduce friction, oil or grease is put between moving elements of machines.
- Rollers are included in travel bags to make them easier to move.
- Wheels on cars and trucks help reduce friction.
- Using ball bearings. Ball bearings, for instance, are used in ceiling fans, bicycles, and cars to cut down on friction.
- A streamlined body helps lower friction.
- Polishing the surface to smooth out the bumps.
Real-Life Applications of Friction
Here are a few examples of friction in our daily lives:
1. Driving a car on a surface
2. Stopping a moving car by using the brakes
3. Skating
4. Walking on the street
5. Writing on a blackboard or notebook
6. Flying planes
7. Putting a nail in the wall
8. Going down a slide in the garden
9. Starting a fire with a matchstick
10. Beating a foot mat or carpet with a stick to get rid of dust
Summary: Advantages and Disadvantages of Friction
1. There are a few advantage of friction:
• Climbing
• Riding • Walking
• Stopping vehicles
• Writing
• Holding
2. There are a few disadvantages of friction:
• Produces heat
• Causes wear and tear
• Causes moving objects to stop
• Stopping vehicles
• Slows down the speed
• Energy is wasted
FAQ
Why do brake pads of bicycles have to be replaced quite often?
The brake pads of the bicycle need to be replaced to ensure that they work properly to stop the bicycle. By frequent use of the brakes, the brake pads are worn out due to friction, which may result in slipping of brake pads on the rim of the cycle when brakes are applied.
What enables us to fix a nail in a wall & knot of lace to be tied?
FRICTIONAL FORCE
It is the friction between the surface of the nail and the wall that keeps the nail intact with the wall.
Even knots in the ropes are held together due to the force of friction.
What makes the steps of foot over-bridges at Railway stations to wear out slowly?
The force of friction between the sole of the shoes and the step brings about wear and tear of the surface of steps of the railway over the bridge.
Since the amount of footfall in a railway station is very high, the wear and tear is significant.
What are the advantages and disadvantages of friction?
Friction is good because it lets us do things like walk, write, and stop cars, but bad because it wears things down and wastes energy as heat.
Why is friction both useful and harmful?
Friction is good for control and grip when moving, but bad because it makes things less efficient and degrades surfaces over time.
Why is friction important in physics?
Friction is crucial in physics because it helps us understand how things move, how energy is lost, and how things really move in the environment.
What happens if there is no friction?
If there were no friction, things would keep sliding forever, making it difficult to do simple things like walk or grasp things.
Is friction always a disadvantage?
No, friction is necessary for safety and everyday tasks, even though it can have certain bad effects.
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