Etymology: Middle English: via Anglo-Norman French from Late Latin fricātiō(n-), from the past participle stem of Latin fricāre ‘rub’.
Meaning:
1. The resistance to sliding between two surfaces in contact: - The tires' friction with the road kept us from stopping in time. - The friction between the two surfaces caused them to heat up.
2. Conflict or disagreement, especially when prolonged: - The two countries had been in a state of friction for decades. - There was a lot of friction between the manager and the employees.
3. (Physics) A force that opposes the relative motion of two surfaces in contact and is proportional to the perpendicular force pressing one surface against the other: - The coefficient of friction determines the amount of force required to move an object across a surface. - Friction is a non-conservative force, meaning that it does not conserve energy.
Origin:
The word "friction" comes from the Latin word "fricātiō(n-)", which means "a rubbing". This word is derived from the verb "fricāre", which means "to rub". The word "fricāre" is thought to be related to the Proto-Indo-European root "prek-", which means "to rub or scratch".
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