Pressure Flashcards
1
Q
what is pressure?
A
the force acting per unit area
2
Q
how can we calculate pressure?
A
p (pressure in Pa or N/m^2)= F (force in N)/ A (area of contact surface in m^2)
3
Q
what is the relationship between depth and liquid pressure?
A
the greater the depth of liquid, the greater the liquid pressure, due to larger amount of liquid above
4
Q
what is the relationship between density and liquid pressure?
A
the greater the density, the greater the liquid pressure (e.g. water pressure is higher than oil pressure because water is denser than oil)
5
Q
how do we calculate liquid pressure?
A
p (liquid pressure in Pa or N/m^2) = h (depth of point beneath liquid surface) x p (density of liquid in kg/m^3) x g (gravitational field strength in N/kg or acceleration due to gravity in m/s^2)
