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2015-09-20T13:03:30+05:30

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THREE TYPES  OF FRICTION-
1.STATIC FRICTION
2.SLIDING FRICTION
3.ROLLING FRICTION

1.STATIC FRICTION-WE CALL THE FORCE OF FRICTION AS STATIC WHEN IT EXISTS BETWEEN TWO SURFACES IN CONTACT,BETWEEN WHICH THERE IS NO RELATIVE MOTION.IN OTHER WORDS THE FRICTION,WHICH BALANCES THE APPLIED FORCE,DURING THE STATIONARY STATE OF A BODY,IS STATIC FRICTION.
2.SLIDING FRICTION-WE CALL THE FORCE OF FRICTION,BETWEEN TWO OBJECTS,WHEN ONE OF THEM IS SLIDING OVER THE SURFACE OF
OTHER,AS THE FORCE OF SLIDING FRICTION,BETWEEN THEM.SLIDING FRICTION IS(A LITTLE)SMALLER THAN THE STATIC FRICTION BETWEEN THE SAME TWO SURFACES.
3.ROLLING FRICTION-THE FORCE OF FRICTION THAT COMES INTO PLAY
WHEN ONE BODY ROLLS OVER THE SURFACE OF ANOTHER BODY.
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2015-09-20T13:58:26+05:30

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
There are 4 types of frictions they are:
1: static friction
2:sliding friction
3:rolling friction
4:fluid friction

Static friction: the frictional force that exists on a stationary object and a surface on which it is resting.
Sliding friction: the frictional force which exists on two stationary objects or by sliding
rolling friction :the frictional force which exerts when one body rolls on other body
fluid friction: the frictional force which exerts in liquids is called fluid friction


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