Liquid Pressure
Science: KS3, topic 3.5.19
Liquid Pressure
Liquids will exert pressure on an object from all directions. The deeper you go, the greater the pressure.
Fluids
- Liquids are examples of fluid.
- As well as liquids, gases are also fluids.
- Liquids and gases have no direct fixed shape.
- Particles in fluids are able to move around.
Liquid pressure
- Liquids will exert pressure on an object from all directions.
- Liquids cannot be compressed.
- There are more particles in liquids than in air.
- So there is a greater pressure in water than air.
Liquid pressure with depth
- Liquid pressure goes up with depth.
- The number of water particles goes up with depth too.
Dam pressure
- A dam is thicker at the bottom.
- Liquid pressure is higher at the bottom.
- The pressure at the bottom of the Mariana Trench is 110,000,000 N/m2 (Pa).
Test yourself on Liquid Pressure
How does liquid pressure change as you go deeper?
Which of these are true of liquids?
What is the pressure at the bottom of the Mariana Trench?
Diver A swims 2 m below the surface of a pool. Diver B swims 8 m below the surface of the same pool. Which diver feels greater pressure from the water?