Pressure in Liquid


Definition of Pressure in Liquid

Liquid has its own weight, this causes pressure on the wall of the container in which liquid is held, it also causes pressure on any object immersed in the liquid".

Definition of Pressure in Liquid


More About Pressure in Liquid:

  • Pressure acts in all directions.
  • Pressure acting on a liquid at rest will be transmitted equally in all directions.
  • Example: Garden Hose
    Garden hose is a flexible pipe attached with a sprinkler at one end. When the water is supplied from the other end, water will pass through the pipe and then through the sprinkler. It can be observed that water spreads with equal force in all directions. The liquid pressure acts in all directions.

    Definition of Pressure in Liquid


    Liquid pressure increases with depth

Examples


Definition of Pressure in Liquid


WORKED EXAMPLE


The diagrams show, to the same scale, the vertical sections of a set of circular vessels. Each vessel contains the same depth of water.


Which of the following statements is correct?
    A. The water exerts the greatest pressure on the base of vessel 1.
    B. The water exerts the greatest pressure on the base of vessel 2.
    C. The water exerts the same force on the base of each vessel.
    D. The water exerts the same pressure on the base of each vessel.
    Correct answer is "D".

Solution


    Step 1: The force on the base of each vessel is the weight of liquid contained in that particular vessel.
    Step 2: As the bases are different, weight of the liquid is different in different vessels.
    Step 3: Pressure doesn�t depend on the shape of the container. Whatever the shape or width, the pressure at any particular depth is the same.

Related Terms: Pascal�s law | Boyle�s law
Translate :