the center of this seasaw is used to balance the board with the seats. The children can easily move up and down without much force. The seesaw is an example of which simple machine?
A seesaw or teeter-totter is a simple machine found on a playground. It acts as a lever, which is simply a bar or rod that pivots (turns) on a point called a fulcrum. The symbol for fulcrum is ∆.
