Galileo's theory....?

Question

Just wondering.... he said, you drop two things at once, from same hight and that they will hit floor at the same time. Two words.... Helium balloon.

Have i just proven a famous theory wrong?

A helium balloon would not exist in a vacuum, it would explode. This makes his theory null surely...

quite clearly u are wrong... it is Galileo, how bout u actually research it before you answer.

Answer 1

No, because Galileo was working with the tenet of gravity, not that of air resistance and buoyancy. In a vacuum, the helium balloon would fall just as fast as a piece of led.

Answer 2

Firstly, it was Newton.
Secondly, The reason helium rises is because it's lighter than air. If you found a container for the helium which was as light as a balloon but which stopped it expanding, it would indeed fall as fast as any other object in a vacuum.

Answer 3

Well technically, nothing can exist in a vaccum as as soon as you introduce an object, it's no longer a vacuum. The theory states that gravity is a constant and therefore mass does not change a constant.

Answer 4

That is not really what he said or was trying to prove. His actions were testing gravity. As a result he found out things like air resistance and bouancy. He was trying to test weight and mass. For instance, something very heavy versus something very light. He attempted to minimize air resistance by making both thing round. He found that the pull of gravity is independant of the mass or density of the object. "Two things dropped at once will...." is incorrect and not what he was trying to discover.

Answer 5

wasn't that newton ?

however its correct, if your helium ballon is strong enough to hold the helium in a vaccum it would reach (lets say the lunar surface) at the same time as anything you would let fall from same height