Razlika između verzija stranice "Čekrk"
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Red 1:
[[Datoteka:PulleyShip.JPG|mini|200px|Čekrk na brodu]]
'''Čekrk''' spada u jednostavne sprave i poznat je od davnina, posebno u [[pomorstvo|pomorstvu]]. Služi za skretanje smjera [[sila|sile]] ili za podizanje ili povlačenje velikih tereta malom silom.
== Vanjski linkovi ==
* http://books.google.com/books?id=xuDDqqa8FlwC&pg=PA196#v=snippet&q=wedge%20and%20screw&f=false
* http://books.google.com/books?id=Q86UKqYui-0C&printsec=frontcover&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=false
* http://www.constructionknowledge.net/public_domain_documents/Div_1_General/Basic_Skills/Basic%20Machines%20NAVEDTRA%2014037%201994.pdf
* [http://books.google.com/books?id=QOYXAAAAIAAJ&pg=PA459&lpg=PA459&dq=Elroy+McKendree+Avery,+Elementary+Physics,+New+York+:+Sheldon+%26+Company,+1878.&source=bl&ots=JgvusHHikF&sig=a95N9DzqdzSPGoel0m3TskK_sm8&hl=en&ei=iv7jTs3LFc-asgLnvNHzBQ&sa=X&oi=book_result&ct=result&resnum=2&ved=0CCcQ6AEwAQ#v=onepage&q=wheel%20and%20axle&f=false http://books.google.com/ Elroy+McKendree+Avery,+Elementary+Physics]
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{{Commonscat|Pulleys}}
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