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Form 4 Chapter 3: Forces and Pressure  CYS   2   Deriving the Formula for Pressure in Liquid  ݑ ܮݑݍ ܥݑ, ൌ ܣ ܯ ݏݏ ܮݑݍ ܥݑ, ൌ ߩൌ ܣߩ  ݐ ܮݑݍ ܥݑ, ൌ ൌ ܣߩ ݎݎݑݏݏ, ൌ ݐ ܮݑݍ ܥݑ ݎܣ ݐ ݏ ܮݑݍ ܥݑ  ൌ ܣ ൌ ܣߩ ܣ ൌߩ  *PRESSURE IN LIQUID DOES NOT DEPEND ON THE SURFACE AREA*  Characteristic of Pressure in Liquid 1. The pressure of liquid increase with depth 2. The pressure of liquid acts in all direction. 3. The pressure of liquid does not depend on the area of its surface. 4. The pressure of liquid does not depend on the shape and size of the container. 5. The pressure of liquid at the same level in the same liquid are equal.  U‐Tube 1. Usually , a U‐Tube is used to compare and measure density of liquids. 2. The density of the 2 liquids is related by the equation:  ଵ ߩଵ ൌ ଶ ߩଶ   Application of Liquid Pressure 1. Dam 2. Submarine 3. Measuring Blood Pressure 4. Intravenous Transfusion 5. Water Tower   

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Page 1: F4C3 Pg 2

Form4Chapter3:ForcesandPressure 

CYS      2 

 

Deriving the Formula for Pressure in Liquid 

  ,  

,   ,  

,

 

 

 

  

*PRESSURE IN LIQUID DOES NOT DEPEND ON THE SURFACE AREA* 

 

Characteristic of Pressure in Liquid 1. The pressure of liquid increase with depth 2. The pressure of liquid acts in all direction. 3. The pressure of liquid does not depend on the area of its surface. 4. The pressure of liquid does not depend on the shape and size of the container. 5. The pressure of liquid at the same level in the same liquid are equal. 

 

U‐Tube 1. Usually , a U‐Tube is used to compare and 

measure density of liquids. 2. The density of the 2 liquids is related by the 

equation:  

 

Application of Liquid Pressure 1. Dam 2. Submarine 3. Measuring Blood Pressure 4. Intravenous Transfusion 5. Water Tower 

  

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