Bernoulli's Law

Have you ever wondered why airplanes and birds have a similar shape? It’s not a coincidence—it’s because of how air moves, as explained by Bernoulli’s Law.

Bernoulli’s Law states that when a fluid moves faster, its pressure becomes lower.

Now, try this: hold a piece of paper by one end and blow across the top. You’ll see the paper lift!

That happens because, when you blow, the air moves faster over the top of the paper. Faster air means lower pressure.

The air under the paper moves more slowly, so it has higher pressure. That pressure difference pushes the paper upward—from high pressure to low pressure.

The same idea helps airplanes and birds fly. Their wings are curved on top and nearly flat on the bottom.

Because of this shape, air moves faster above and slower below, creating lift—the upward force that keeps them in the sky.

Bernoulli’s principle also appears in race cars, where inverted wings create higher air pressure above and lower air pressure below, pushing the car down onto the track for better grip and control.