How does the balloon rise up?

Archimedes’ law works equally in water and in air. No object whose density is less than the density of water (that is, it is lighter than it) can lie on the bottom. Supports it close to the surface or does not allow buoyancy to sink at all. Similarly, everything happens in the atmosphere. A balloon or aerostat “floats”. The gas filling it or the heated air is lighter than the surrounding air. But the shell and equipment are heavy, and the force that causes the ball to push upward is small. And in order for the flight to take place, it must surpass the force of gravity. Therefore, the balloon is so huge – the larger its volume, the more significant the force of Archimedes becomes.