Levers carly
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Levers carly

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Levers carly Levers carly Presentation Transcript

  • By:Carly Kelly
  •  A lever must have a fulcrum . It helps you lift stuff. A lever is a simple machine. A lever is a useful machine. A lever has to be a etched to a machine
  •  You push a lever down four feet! They were made 440 million years ago . People have used them two hundred thousand years ago !They were began in 200 b c.People starting using levers about 17,000 b c ago.
  •  Animals have levers in them Balance scale Balance beam