winter-2

Seesaw

A see saw (also known as a teeter-totter or teeter board) is a long, narrow board pivoted in the middle so that, as one end goes up, the other goes down. Mechanically a seesaw is a lever and fulcrum. Seesaws also work as a simple example of a mechanical system with two equilibrium positions. One side is stable, while the other is unstable.