hesslever

Lever

__**Definition**__-A rigid bar bar fixed to move around a point. __**Examples**__- First Class: see-saw, scissors, hammer removing nail, pliers, crowbar, and shoehorn Second Class: diving board, wheel barrow, nut cracker, stapler, bottle opener, door, and wrench Third Class: pencil(mandible), tweezers, fishing pole, broom, rake, hammer, jack hammer, baseball bat, mouse trap, shovel, arm, leg(kicking), hockey stick, golf club, oars, tongs, and fork. __**Greatest Mechanical Advantage(GMA)-**__ The Load should be at one end with the fulcrum, there should only be enough room for the fulcrum and load at the end. The effort should be at the opposite side. http://www.enchantedlearning.com/physics/machines/levers.shtml http://www.vectorpark.com/levers http://www.addictinggames.com/levers.html __**Experiment:**__Materials-board, hammer, nail What happens:put nail on board and hit continually with hammer. The nail will go into the board. This is using a third class lever.
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