Question

what is friction? describe in simple way

Answer 1

FRICTION IS A ACTION WHICH PRODUCES HEAT.
AS WHEN A MATCH STICK IS RUBBED IT START BURNING BECAUSE IT PRODUCES FRICTION


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Answer 2

the force that opposes motion is called friction.

when any thing moves the force of friction acts on it in the opposite direction of motion.
when in air or water FLUID FRICTION or DRAG
acts on the object and thus aeroplanes and submarines are streamlined to reduce the DRAG.

friction are of 3 types:-
1) static friction
2) sliding friction
3) rolling friction