a scale, a teeter toter
LEVERThe long board they sit on acts like a lever.
Lever
"lever"
A balance or lever.
a lever(toot)
levers. a simple machine
lever. More specifically in the case of a see-saw, the long board is a balance beam.
That would be a first class lever.
That would be a first class lever.
balance or lever
it acts like a pair of scales the heavier one moving down and the lighter one going up. why?
It acts like a lever - with the central fixing post simulating the fulcrum.