06 pressure Flashcards
1
Q
Definition
Pressure
A
Force per unit area.
Unit:
* Newton per square metre, N/m2
* Pascal, Pa
2
Q
Formula
Pressure
Solids
A
P = F/A
F = force
A = area
3
Q
Formula
Pressure
Liquids
A
P = hρg
h = height
ρ = density
g = gravitational field strength
4
Q
Atmospheric Pressure
A
1.013 x 105 Pa
5
Q
Hydraulic System
Pascals’ Principal
A
- Liquids are incompressible
- If pressure is applied in an enclosed system, it is transmitted to all parts of the liquid
6
Q
Formula
Hydraulic Systems
A
F1/ A1= F2/ A2