A seesaw is a lever. A lever is a rigid beam with a pivot point in the center, called a fulcrum. As one person goes up, the other goes down. For the best use of a seesaw, you’ll want to balance your weight with the person across from you. Now, you don’t have to be perfectly balanced but be mindful, the person opposite from you depends on you to keep them in the air while you sit on the ground. If one person gets off the seesaw while the other is in the air, they’ll come crashing down!
If we want to balance the lever we will use the formula:
One Person’s Mass x distance to point = Other person’s mass x distance to point
In other words two people of the same weight have to sit an equal distance from
the fulcrum, in order to balance the lever.
Click here to learn about the physics of a see-saw