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Physics Education

Article . 1990 . Peer-reviewed

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Physics Education

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Is the frictional force always opposed to the motion?

descriptionPublicationkeyboard_double_arrow_right Article 01 Mar 1990Publisher:IOP PublishingJournal:Physics Education, volume 25, pages 82-85 (issn: 0031-9120,

Authors: Agustín Sánchez-Lavega; M A Arriandiaga; Agustín Salazar;

doi: 10.1088/0031-9120/25/2/001

Is the frictional force always opposed to the motion?

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Abstract

A common idea is that frictional force is always opposed to motion. With the aid of two examples the authors show how, in some cases, the frictional force acts in the same direction as the centre of mass velocity of the body accelerating it.

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Spain

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	citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	25
	popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.	Top 10%
	influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	Top 1%
	impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.	Average