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Poluga

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by

Kristina Marković

on 26 May 2014

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Transcript of Poluga

Poluga
Poluga je svako cetvrto telo koje moze da se obrce oko nepokretnog oslonca, a na koje istovremeno deluju bar dve sile teznjom da izazovu suprotna obrtanja oko njenog oslonca.
Postoje dvostrana i jednostrana poluga.
Poluga je u stanju ravnoteze kada je proizvod sile i njenog kraka jednak proizvodu tereta i njegovog kraka F:a=Q:b
a- krak sile - je normalno rastojanje od oslonca do mesta delovanja sile.
b- krak tereta - je normalno rastojanje od oslonca do mesta delovanja tereta.
Dvostrane
Terazije
Rimski kantar
Kljesta
Makaze
Dizalica

Jednostrane
Lopata
Teniski reket
Stap za pecanje
Pinceta
kljuc za odvrtanje
Pajser
Krckalica za orahe
Uredila: Kristina Markovic <3
Full transcript