Lestresa: diferèntzias tra is versiones

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Created by translating the page "Speed"
 
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In s'impreu cuotidianu e in sa [[cinematica]], sa '''lestresa''' de un'ogetu est sa grandesa de sa [[velotzidade]] sua (su tassu de variatzione de sa positzione sua); est tando una cantidade iscalare.<ref>{{cite book|last=Wilson|first=Edwin Bidwell|title=Vector analysis: a text-book for the use of students of mathematics and physics, founded upon the lectures of J. Willard Gibbs|date=1901|pages=125|url=http://hdl.handle.net/2027/mdp.39015000962285?urlappend=%3Bseq=149}} This is the likely origin of the speed/velocity terminology in vector physics.</ref> Sa '''lestresa mèdia''' de un'ogetu in unu discansu de tempus est sa [[distàntzia]] fata dae s'ogetu divisa pro sa durada de su discansu;<ref name=":0">{{cite web|url=http://physics.info/velocity/|title=Speed & Velocity|last=Elert|first=Glenn|date=|website=The Physics Hypertextbook|archive-url=|archive-date=|dead-url=|access-date=8 June 2017}}</ref> sa lestresa istantànea est su lìmite de sa lestresa mèdia cando sa durada de su discansu de tempus s'acùrtziat a zero.
 
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* Richard P. Feynman, Robert B. Leighton, Matthew Sands. The Feynman Lectures on Physics, Volume I, Section 8-2. Addison-Wesley, Reading, Massachusetts (1963). ISBN{{ISBN|0-201-02116-1}}0-201-02116-1.
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