Charlie Haffey Norwood Elementary Science

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Presentation transcript:

Charlie Haffey Norwood Elementary Science Levers Charlie Haffey Norwood Elementary Science

What Are Levers? A board or a bar Little flexibility Pivots On a fulcrum

Lever Types 1st Class 2nd Class 3rd Class

1st Class Lever L E L E Load and Effort move in opposite directions.

http://www.lhup.edu/~dsimanek/museum/themes/PanBalance.jpg http://www.oneida.com/sale/clearance/kitchenware/salad-tongs.html http://cfnewsads.thomasnet.com/images/large/464/464060.jpg http://us.cdn1.123rf.com/168nwm/pixologic/pixologic1208/pixologic120800401/14926259-human-skeleton-side-view-of-head-isolated-in-gray.jpg 1st Class Lever

Best 1st Class lever http://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&docid=t0SsEsWKRdKaDM&tbnid=cS5H8Yn5hOc6wM:&ved=&url=http%3A%2F%2Fwww.freerepublic.com%2Ffocus%2Ff-news%2F1031027%2Fposts&ei=mvaGUfOXG6aO0QHlw4GgAg&bvm=bv.45960087,d.dmQ&psig=AFQjCNEjf_ySFitf505UK4xJTIIQsEjvWQ&ust=1367885844395812

2nd Class Lever L E

http://bemidji.k12.mn.us/~kmcmartin/S01848C8301848C83.3 2/second%20class%20lever%202.jpg http://static.neatorama.com/images/2010-09/pop-top-bottle-opener.jpg http://www.baileybio.com/plogger/thumbs/lrg-232-2nd_class_lever.jpg 2nd Class Lever

Best 2nd Class lever http://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&docid=7XLUwIVxWqrnaM&tbnid=_HgDgin1ORnuFM:&ved=&url=http%3A%2F%2Fwww.humorimagez.com%2Fapps%2Fphotos%2Fphoto%3Fphotoid%3D133019428&ei=4AGHUbGxD-Xm0QGlnoHgDw&bvm=bv.45960087,d.dmQ&psig=AFQjCNF-Rd0rmIgB2w_rKfmTXjGmeW39jQ&ust=1367888725672992

3rd Class Lever E L

3rd Class Lever http://theundercoverrecruiter.com/wp-content/uploads/job-search-catapult.jpg http://www.14-19nw.org.uk/pluginfile.php/20519/mod_page/content/4/tweezers.jpg http://www.humankinetics.com/AcuCustom/Sitename/DAM/086/19art_Main.png

Best 3rd Class lever http://www.ginkandgasoline.com/wp-content/uploads/2012/10/fly-fishing-fly-casting.jpg

Mechanical Disadvantage E > L Trading Force For Distance

Charlie Haffey Norwood Elementary Science Levers Charlie Haffey Norwood Elementary Science