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Archimedes' principle

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Archimedes' principle

  1. 1. Done by : Gourisankaran Pillai Grade IX
  2. 2. Archimedes was born in 287 BC at Syracuse, Greece ,one of the most powerful Greek city state. In Syracuse 212BC Archimedes died, by being killed by a Roman soldier who didn’t know who he was. Archimedes had a father who’s name was Phidias. It is believed Phidias could have been related to Hieron the 2nd ,the king of Syracuse. It is not known if Phidias was married or had
  3. 3. Archimedes’ Principle Archimedes Principle states that when a body is immersed partially or fully in a fluid, it experiences an upward force that is equal to the weight of the fluid displaced by it.
  4. 4. BOUYANT FORCE or UPTHRUST WHEN A BODY IS IMMERSED PARTIALLY OR COMPLETELY INSIDE A FLUID IT EXPERIENCES AN UPWARD FORCE CALLED THE BUOYANT FORCE
  5. 5. Buoyancy
  6. 6. The Buoyant force acting on an object depends upon two factors: The volume of the body immersed i.e. volume of the fluid displaced , or density of the fluid
  7. 7. o o Take a Eureka can and fill it up to its spout. Take a stone and suspend it with the hook of the spring balance.Note the weight of stone in air.Let it be w1. Now immerse the stone inside water in the Eureka can. The water overflows through the can. Collect this overflowing water in the beaker. Now, also note the reading in the spring balance.Let it be w2.
  8. 8. o o o This w2 will be less than w1 due to upthrust provided by water. Apparent loss in weight due to upthrust will be (w1-w2). Measure the weight of water collected in the beaker , which in fact is the weight of water displaced by the stone . On comparing we will find that the loss in weight (w1-w2 ) is equal to the weight of the water displaced by the stone. Hence , The Archimedes' principle is verified.
  9. 9.    Used in designing ships and submarines Used in making Lactometers, which are used to determine the purity of a sample of milk Used in making Hydrometers , which are used for determining density of liquids

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