Force and pressure units
Units that support prefixes are shown in bold.
| Unit Name, System | Units Students Enter | Infix You Code | Notes |
|
atmosphere SI |
atm | atm | |
|
bar SI |
bar | bar | |
|
dyne SI |
dyn |
dyn |
|
|
equilibrium intensity SI, SI, US |
N*m^(-1) kg*s^(-2) lb*ft^(-1) |
N*m^(-1) kg*s^(-2) lb*ft^(-1) |
Code equilibrium intensity as N/m unless you specifically need kg/s^2. |
|
Henry’s law constant units SI |
mol*(L*atm)^(-1) | mol*(L*atm)^(-1) | For student input, mol, mole, and moles are considered acceptable alternate spellings, but you should code answers using the infix mol. |
|
kilopound US |
kip
kips |
kip | For student input, kip and kips are considered acceptable alternate spellings. |
| kilopound per square inch
US |
ksi | ksi | |
|
millimeter of mercury SI |
mmHg | mmHg | |
|
newton SI |
N m*kg*s^(-2) |
N m*kg*s^(-2) |
Code force as N unless you specifically need kg*m/s^2. |
|
pascal SI |
Pa N*m^(-2) m^(-1)*kg*s^(-2) |
Pa N*m^(-2) m^(-1)*kg*s^(-2) |
Code pressure in Pa unless you specifically need N/m^2. Avoid using base units. |
|
pound US |
lb |
lb | |
|
pounds per square inch US |
psi lb*in^(-2) |
psi lb*in^(-2) |
Code pressure in psi unless you specifically need lb/in^2. |
|
spring constant SI, SI, US, US |
N*m^(-1) kg*s^(-2) lb*ft^(-1) lb*in^(-1) |
N*m^(-1) kg*s^(-2) lb*ft^(-1) lb*in^(-1) |
|
|
surface tension SI |
J*m^(-2) N*m^ (-1) kg*s^(-2) |
J*m^(-2) N*m^ (-1) kg*s^(-2) |
|
|
torque SI |
N*m kg*m^2*s^(-2) |
N*m kg*m^2*s^(-2) |
Code torque as N*m unless you specifically need the base units. |
|
ton US |
t | t | Conversion to U.S. tons; British tons are different (2240 lb). |
|
torr SI |
torr | torr | For student input, Torr and torr are considered alternate spellings. |
|
torsion constant SI |
N*m*rad^(-1) kg*m^2*s^(-2) |
N*m*rad^(-1) kg*m^2*s^(-2) |
Code the torsion constant as N*m/rad unless you specifically need the base units. |
|
viscosity SI |
Pa*s N*s/m^2 kg*(m*s)^(-1) |
Pa*s N*s/m^2 kg*(m*s)^(-1) |
Code viscosity as Pa*s or N*s/m^2 unless you specifically need the base units. |
See also: