ELI5: Explain Like I'm 5

Center of pressure (fluid mechanics)

In fluid mechanics, the center of pressure is an invisible point where the total amount of pressure being exerted on an object is balanced. Think about it like a seesaw-- if you push one side down, the other side will go up so that they balance each other out. That point of balance is the same thing as the center of pressure. In fluid mechanics, the center of pressure moves around as the fluid (air or water) changes around the object it's pushing against.