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M - Simple Machines

Simple machines for science class - Mrs. Ball

TermDefinition
first class lever has the fulcrum between the effort arm and the load
second class lever has the fulcrum at one end and the effort arm at the other end. the load is in the middle
third class lever has the fulcrum at one end and the load at the other end
pulley a wheel that has a groove along its edge and a rope or chain goes in the groove
wheel and axle either a wheel turns an axle or an axle turns a wheel around a central pivot
screw inclined plane wrapped around a cylinder or cone
inclined plane a flat slopping surface
wedge made up of one or two inclined planes
examples of first class lever tongs for salad, pliers, scissors
examples of second class lever nut cracker, wheel barrow, bottle opener
examples of third class lever tongs, stapler, tweezers
examples of pulley elevator, flag raiser, crane, well with bucket
examples of wheel and axle water wheel, Ferris wheel, wheel on a bike, fishing pole
examples of screw post hole digger, jar or bottle top, drill bit
example of inclined plane road on a hill, wheelchair ramp, slide
example of wedge letter opener, maul or ax, chisel, doorstop, crowbar
Created by: browngdavid