Downforce

Do you know how when you're in a car and you stick your hand out the window, it feels like the wind is pushing your hand backwards? That's kind of like what downforce is - it's the pressure that keeps a car (or airplane or other vehicle) from lifting up off the ground or flipping over.

See, when a car is moving really fast, the air rushes over it and creates a sort of pressure difference between the top and bottom of the car. The air moving over the top of the car creates a low pressure area, while the air moving underneath the car creates a high pressure area. This difference in pressure can make the car want to lift up off the ground, especially if it's going really, really fast.

Enter downforce! Downforce is created by things on the car or airplane (like wings or spoilers), which are designed to disrupt or redirect the flow of air over and under the vehicle. By doing this, the air creates a more even pressure distribution, which helps keep the car or airplane firmly on the ground or in the air without flipping or lifting off.

It's like if you were playing with a toy car on a windy day - if you put a big rock on top of it, the wind wouldn't be able to blow it away, because the weight of the rock is keeping it down. The downforce works the same way, except instead of a rock, it's the shape of the car or airplane that's keeping it pressed down.