Have you noticed any athlete parachuting someone in the act? Why are these athletes could still hover in the air and not directly fall to the ground?
But, do you ever imagine, what happens if the athlete falls from a height where there is no air at all, aka vacuum? Yes roughly what will happen with these athletes?
In the past, the nature of the motion of objects falling is a very interesting discussion material in natural philosophy. Aristotle
once said that "downward motion of an object that has a greater weight
will be accelerated proportional to its size." Over the centuries
Aristotle's view has been challenged seriously, when Galileo Galilei
(1564-1642) reveals the fact that the actual basis of experiments and then publish it. In
the end of his life Galileo wrote a book called "Dialogues Concerning
Two New Sciences" which contains a detailed discussion of the
observations of the motion.
Aristotle's belief that heavier objects fall faster is a thing that is common. It
seems also supported by the demonstration that shows that a coin (a
coin) and dropped a piece of paper that will come together on the floor
at different times, coins arrived on the floor faster than paper.
But
when the paper first crushed to clot and the demonstration repeated,
apparently arrived coins and paper on the floor at the same time can be
said.
Why was there such a difference?
In the first demonstration of air resistance on larger paper, so that it falls more slowly than coins. At
the next show reduced air resistance on paper, until almost as large as
a drag on the coin, because it's almost the same rate of fall.
Of course direct examination can be done by dropping it in a vacuum. Can
be shown that in a vacuum chamber, even though it is not a perfect
vacuum, a feather birds and a metal ball a thousand times heavier falls
at a rate of (rate) are practically indistinguishable.
