learning about levers evan
TRANSCRIPT
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Evan Raeder
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LeversA lever is a handle or bar that is attached a
piece of machinery in order to operate the piece of machinery.
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Learning About LeversBy about 17,ooo BC people used levers to
Throw spears farther and harder than before.The reason why people invented levers is to
make lifting things easer.
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Learning About LeversEvery lever has tree parts a bar, fulcrum, and
a load.All levers must have a fulcrum.Animals figured out how to use levers to get
work done. One type of lever you need to pull. And
another type thers a force you need to push down to lift the load.
There are three different Kinds of levers.
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Learning About Levers