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 The frictional force occurs when two bodies  in contact, move relative to each other then there exists a force which has a tendency to oppose that movement.The frictional force is responsible for wear and tear of two bodies. There are  4 different types of friction.

1.Static friction

        example: pushing on a wall

2.Kinetic friction

        example:falling on the pavement

3.Fluid friction and 

         example: swimming

4.Rolling friction

         example: riding a motorcycle