Here is a collection of
some of the most often used mechanical units. Both SI (metric) and SAE (English) units are given.
There
are two fundamental types of units: base units and derived units. Base units include meter, foot, kilogram,
second, etc. Derived units involve a combination of base units, such as square meter, kilometer/second, etc.
Length |
meter |
m |
foot |
ft |
Area |
square meter |
m^{2} |
square foot |
ft^{2} |
Volume |
cubic meter |
m^{3} |
cubic foot |
ft^{3} |
Mass |
kilogram |
kg |
pound |
lb |
Density |
kilogram/cubic meter |
kg/m^{3} |
pound/cubic foot |
lb/ft^{3} |
Time |
second |
s |
second |
s |
Speed |
kilometer/second |
km/s |
foot/second |
ft/s |
Force |
newton |
N |
pound-force |
lbf |
Pressure |
pascal |
P |
pound/square foot |
lb/ft^{2} |
Plane Angle |
radian |
rad |
degree |
° |
Solid Angle |
steradian |
ster |
square degree |
deg^{2} |
Momentum |
kilogram*meter/second |
r |
pound*foot/second |
r |
Torque |
newton/meter |
t |
pound-force/foot |
t |
Young's modulus |
pascal |
E |
pascal |
E |
Kinetic energy |
joule |
K |
watt*second |
K |
Potential energy |
joule |
U |
watt*second |
U |