Archimedes
helped the world the discovery of floating bodies it was at that time the most
important innovation.
Archimedes'
principle (Water push the body floating toward the top strongly equal to the displaced
water).
He has
another important innovation (levers):
The force
that is pressing on a lever side Create Lifting force on the other side Commensurate
with the longitudinal sides of the lever).
The story of
the invention of Archimedes:
In 260 BC, Archimedes
studied astronomy and engineering In Syracuse in Sicily in 26-year-old.
One day he
saw kids playing on the beach balancing a wooden board on a rock The height of
the rock is equal to limit loin Stop one of the children at one end of the
board While his friends jumped on the other end The result was throwing the boy
into the air.
Then the
children budged the board away from the center of the Rock, The short side was
representing a quarter of the board, Boys stood on the short side and the other
boy jumped on the long high side then His friends dropped the air.
Archimedes
was watching that and thinking about it.
Archimedes
used a strip of wood and small wooden molds to represent what he saw in playing
of boys, he put a Triangle-shaped mold to present the rock, when he balanced
those things on both ends of the lever and they were different in we weight, he
found that the levers Subject to one of the Proportions Euclid.
In 245 BC King
Hieron ordered Archimedes Verification of weight of gold which made the
king's crown. The king thought that the Goldsmith was cheating him, Archimedes
should check it out without breaking down crown and that seems impossible.
Many
of the stories about Archimedes' discovering floating bodies Such as:
Archimedes
was taking a shower in public, he noticed that his hand floating on the water
and he start to think about that.
He
got up inside the bathtub and He noticed that the water level dropped when it
sits the water level rises and he feel less weight contrariwise when he get up
he feel Heavier.
Archimedes
took a rock and mold of wood almost same size and flooded in water, wooden mold
was float On the contrary, the stone which sank in water, Water power push
bodies towards the top Equal to the amount of water displaced and the Weight
underwater Proportional to the density of the body.
Archimedes
was able finally to answer the King's Question The crown if it were made of
another metal will have the same weight but the intensity is different and
therefore will have a different size.
Archimedes
dipping the crown with an equivalent weight of gold in a basin of water, its displaced
largest amount of water and showed that the crown was beguiled.
ليست هناك تعليقات