The experiment of the night: beer in free fall?
Recently, in a lively family dinner, a curious bet arose: what would happen if we launched two bottles of beer from a sixth floor? One full and another empty. Is the ground reaches at the same time? The answer takes us to a trip over time, where one Galileo Galilei already wondered the same thing more than 400 years ago.
Galileo and his follies: the legacy of physics
It is said that the Italian genius did experiments from the Torre de Pisa, although his most famous method involved inclined planes. Galilei reached a monumental conclusion: objects, regardless of their weight, fall at the same pace! But this is where the air enters the discussion.
The fall in vacuum vs. air resistance
In a vacuum, the dynamic is clear. Two objects of different masses would fall to the ground exactly at the same time, thanks to the constant gravitational force. But, when the air occurs in the equation, things are complicated. So who is the culprit that a steel ball has an advantage over a parachute?
The invisible villain: air friction
This is where the friction plays its malevolent role. Imagine an object through the air: the more aerodynamic it is, the easier it will be its path. Now, contrast that with a heavy parachute fabric that fights considerable resistance. The mixture of forces at stake is undoubtedly an interesting show.
How the air controls our fall
For example, if we release a projectile from a great height, it will begin slow and, as it falls, it will accelerate, however, friction also increases! Upon reaching a point where the resistance matches the weight, the projectile will reach its maximum speed, a phenomenon known as ‘terminal speed’.
Solids, liquids and gases: a scientific soup
Resistance also varies according to the state of matter. Passing through a liquid or a solid can sharply stop the fall of an object. Without friction, we could imagine how the human being would fall – without a parachute, of course, who dares to experiment with this?
So, do beer bottles fall the same?
Returning to the starting point, throwing beer bottles may seem like a game of chance, but if it took place in a vacuum camera, we would be amazed to see Galileo’s experiment come alive. All objects, regardless of their weight, would fall together. Imagine Galileo’s face when watching a NASA video demonstrated in reality!
Final reflections: Should the experiment repeat?
And although the idea of two families betting on bottles of beer thrown from a high floor sound funny, let’s let science talk. Maybe next time we could try to launch somewhat less valuable. In the end, knowledge is the real treasure, right?
