The principle of the
seesaw is the principle of leverage. The pressure of the person on the seesaw is the power and resistance, and the distance between the person and the fixed point of the seesaw is the power arm and the resistance arm respectively.
The downward acceleration leads to one up and down, the high one’s downward acceleration is greater than the low one, so the high one drops, and at the same time the lower one is lifted up under the action of the principle of leverage, and so on.
