Question

define force of friction
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Answer 1

$\small\mathbf\orange{{FORCE \: OF \: FRICTION }}$

Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types of friction: Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact.

Answer 2

Question

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define force of friction

Answer

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Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. ... Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact.

$\huge\bold\color{red}{l.. hope.. you.. understand!!}$