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Density<br />

Pressure<br />

F<br />

P =<br />

A<br />

http://www.one-school.net/notes.html<br />

Force and Pressure<br />

ρ =<br />

11<br />

m<br />

V<br />

ρ = density (kg m -3 )<br />

m = mass (kg)<br />

V = volume (m 3 )<br />

P = Pressure (Pa or N m -2 )<br />

A = Area of the surface (m 2 )<br />

F = Force acting normally to the surface (N or kgms -2 )<br />

Liquid Pressure<br />

P= hρg h = depth<br />

ρ = density<br />

(m)<br />

(kg m -3 )<br />

g = gravitational Field Strength (N kg -1 )<br />

Pressure in Liquid<br />

P = P + hρg atm<br />

Gas Pressure<br />

Manometer<br />

h = depth (m)<br />

ρ = density (kg m -3 )<br />

g = gravitational Field Strength (N kg -1 )<br />

Patm = atmospheric Pressure (Pa or N m -2 )<br />

P = P + hρg atm<br />

Pgas = Pressure (Pa or N m -2 )<br />

Patm = Atmospheric Pressure (Pa or N m -2 )<br />

g = gravitational field strength (N kg -1 )<br />

ONE-SCHOOL.NET

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