FRICTION is the opposing force created whenever two surfaces move or try to move over each other.
FRICTION is used while -1)walking -there is friction between our legs and ground
                                      2)writing- there is friction between pencil and paper 
                                      3)Driving- there is friction between the tire and ground
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Friction is the resistance experienced by an object or surface when moving over one another. It is contact force. We use it as:
- We use friction while walking, friction between our foot and ground helps us in   walking. - Friction helps us to write too. Friction acts between pen and paper.
- Wood is cut because of the friction caused by the axe.
- We also use friction while opening the lids of jars, caps of pens , etc.

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