Karin

> << Aren't these called levers? >>
>
> Not if both ends are equal and not if one end isn't underneath something
> being pried up, I think.
>
> I think something can pivot on one plane only. "Pivots 360 degrees" is
what
> they say when it goes around, I think.
>
> Sandra
>



http://www.ed.uri.edu/SMART96/ELEMSC/SMARTmachines/lever.html

LEVER: The lever is a simple machine made with a bar free to move about a
fixed point called a fulcrum.
There are three types of levers.

A first class lever is like a teeter-totter or see-saw. One end will lift an
object (child) up just as far as the other end is pushed down.

A second class lever is like a wheel barrow. The long handles of a wheel
barrow are really the long arms of a lever.

A third class lever is like a fishing pole. When the pole is given a tug,
one
end stays still but the other end flips in the air catching the fish.


I've learned quite a lot about levers today. <g>

Karin