Advantages of Friction
Friction is very useful in our daily life. Without it, many activities would not be possible.
1. Friction helps us walk
When we push our foot backward, friction between the ground and our foot pushes us forward. Without friction, we would slip.
2. Friction helps vehicles move
Tyres grip the road because of friction. This grip allows cars, cycles, and buses to start, stop, and turn safely.
3. Friction helps in writing
Pens and pencils work because friction allows their tip to rub against the paper and leave marks.
4. Friction helps us hold objects
We can hold a book, bottle, or pen because friction provides grip between our fingers and the object.
Disadvantages of Friction
Although friction is useful, it also has negative effects.
1. Friction causes wear and tear
Shoes, tyres, machine parts, and tools become worn out over time because friction wears them down.
2. Friction produces unwanted heat
Machines get hot due to friction. This can damage machine parts and require cooling.
3. Friction wastes energy
Extra energy is needed to overcome friction. Vehicles use more fuel because friction opposes motion.
4. Friction slows things down
When friction is high, objects move slower. This is not always desired, especially in machines.