What Makes Hot Air Balloons Fly

How hot air balloons work is thanks to the hot air inside the balloon, produced by the burner. Science tell us that hot air rises, and as the air is heated inside the balloon it causes it to rise upwards (because it is lighter than the cooler air on the outside).

How does a hot air balloon fly physics?

The principle behind hot air balloon physics is the Archimedes Principle which states that the buoyant force on a submerged object is equal to the weight of the fluid that is displaced by the object. For a hot air balloon, the upward buoyant force acting on it is equal to the weight of air displaced.

Why do hot air balloons float chemistry?

Hot air is less dense than cold air. When this happens, the molecules slow down and take up less space. The air inside the balloon is no longer less dense than the air outside. … So hot air balloons float because hot air is less dense than cold air.