How Does Explaining Hydrodynamic Forces in a Nutshell During Overtaking Situation Work?

When two cars try to pass each other on the road, hydrodynamic forces can make it feel like they're pulling or pushing against each other, just like when you’re trying to swim in a crowd.

Imagine you're in a bathtub with water. If you move your hand through the water slowly, it feels easy. But if you move it fast, it suddenly feels like there's something resisting you, like an invisible wall. That’s hydrodynamic forces at work! They’re just like that, but for cars.

When a car tries to pass another one on the road, the air around them acts like water in the bathtub. If the passing car speeds up quickly, it feels like there's an invisible hand pulling it back, this is because of hydrodynamic forces. The car being passed might even feel like it’s getting pushed forward a little.

It’s just like when you're on a playground swing, if you move too fast or too slow, it feels harder to keep going. Cars are kind of like swings in the air!