2. Levers
A lever is a handle or bar that is attached a piece of
machinery in order to operate the piece of
machinery.
3. Learning About Levers
By 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.
4. Learning About Levers
Every 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.
