Fluid pressure Flashcards
(10 cards)
What are fluids
Fluids are substances that can flow because there particles are free to move, this can be a liquid or a gas
How is pressure caused in a fluid
When particles move around they collide with surfaces and other particles, exerting a force on the object they collide with
What is the pressure of a fluid
A force is exerted normal (at right angles) to any surface in contact with fluid
Equation linking pressure force and area together
F=pa
What is the unit of pressure
Pascals (Pa)
The density is … in any liquid
Uniform
The more particles a fluid has in a certain space…
The more dense it is
Why does pressure increase with depth
-As the depth of the liquid increases the number of particles above that point increases
-the weight of these particles add the pressure felt at that point
Equation linking pressure, density, gravitational field strength and height
p=hpg
Units for density
Kg/m3
