Tiêu đề 03_VI-PHY.E-TEC_(PRESSURE)_WS,KEY & ADD_VOL-2_67-100.pdf ✅

[e-Techno TEXT BOOK] VI - Physics (Vol-2) 67 PRESSURE CONTENT Thrust Pressure Applications of pressure Pressure in fluids Laws of liquid pressure Pascals law Atmospheric pressure Buoyancy Archimedes’ principle
VI - Physics (Vol-2) [e-Techno TEXT BOOK] 68 MEMO GRAPH PRESSURE Thrust Unit of pressure units of thrust applications of pressure Types of pressure in fluds Atmospheric pressure Laws of liquid pressure Pascal’s law Bramah press Uses of Bramah pressure Application of pascal’s law Archimedes principle Down word pressure upward pressure Lateral pressure Simple Barometer Buoyancy
[e-Techno TEXT BOOK] VI - Physics (Vol-2) 69 PRESSURE Archimedes (287BC - 212BC) Archimedes (287BC–212BC) was a Greek scientist. He was an inventor, an astronomer, and a mathematician. He was born in the town of Syracuse in Sicily in what is now Italy. He was very famous during his life and he may be one of the most clever people who have ever lived. He is now said to be one of the most important scientists and the greatest mathematician of the ancient world. His father was Phidias, an astronomer, and he may have been in the family of a king of Syracuse. Syracuse was a rich Greek city, on the sea shore in Sicily. When Archimedes was about ten years old, he left Syracuse to study in Alexandria, in Egypt in the school of Euclid, who was a famous mathematician. Not much is known about the personal life of Archimedes, for example, whether he was married or if he had children. Archimedes (287BC - 212BC) KNOW YOUR SCIENTIST PRESSURE SYNOPSIS-1 Thrust : When a body is placed on a surface, the weight of the body acts downward and the force exerted by the body on the surface is equal to the weight of the body. The total force exerted by the body perpendicular to the surface is known as thrust. F F F Example : Consider a rectangular block of mass 2 kg lying on the ground. The thrust on the surface of the ground due the block = weight of the block= mg = 2 kg × 9.8 ms–2 = 19.6 kg ms–2 = 19.6 N Units of thrust : Since thrust is a type of force its units are same as that of the force. S.I. unit of thrust = newton (N) C.G.S. unit of thrust = dyne Pressure: Thrust acting over a unit area of the surface is called pressure. (or) Normal force acting per unit area of the surface is called the pressure. Pressure A F