Chapter 4 - Forces Flashcards
1
Q
Equation for pressure
A
P = f/a
2
Q
Equation for pressure when submerging items
A
p = h ρ g
3
Q
How is the pressure for submerging items derived?
A
Pressure = force or weight / area Weight = mass * g Mass = ρV * g V = h * A
Hence :
Pressure = ρ * h * A * g
-----------------
A
As A cancels out:
pressure = ρ h g
4
Q
Pressure and height relationship
A
Directly Proportional
5
Q
How to find the pressure on a submarine?
A
It would be the atmospheric pressure and the pressure by the water.
6
Q
Upthrust equation
A
u = x ρ g A
x- the height of the object.
7
Q
Archimedes’ Principle
A
The upthrust exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the fluid that the body displaces.
