Friction As a Necessary Evil

Friction

An opposing force called into plain, when two surfaces in contact with each other tend to slide relative to one another is called friction.

Example

Sander on a Piece of Wood = High Degree of Friction

Types of Friction

Static FrictionLimiting FrictionSliding Friction

Friction As A Necessity

Friction as a necessity it produces heat and slows down moving bodies.

If there were no friction, the bodies will either slip or not move.

Benefits Of Friction

We are able to drive automobiles Writing on paper

Spiked shoes of cricket players

Striking a matchstick

Disadvantages Of Friction

Forest fires are caused

Noise pollution is caused

Friction AS An Evil

Friction as an evil Friction brings about wear and tear in moving bodies .

It produces heat and slows down moving bodies.

A lot of energy is wasted in overcoming friction.

Is Friction good or bad?

Friction can be a good When

we walk we push backwards

against the ground,

the  opposing force pushes us forwards.

Without friction , our feet

would slip and walking would

be impossible.

Friction can be bad

 Soil erosion caused by wind (friction of a fluid).

Holes in your shoes, jeans. (friction of a solid) high friction.

Lack of friction is dangerous too, you may fall if the floor is very slippy.