A.4. MASS, FORCE, AND WEIGHT
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Table A.l: SI Units and Symbols
Quantity
Unit
Name
Unit
Symbol
In Terms
of Other
Units
In Terms
of SI Base
Units
SI Base Units
length
meter
m
-
m
mass
kilogram
kg
-
kg
time
second
s
-
s
SI Supplementary Units
plane angle
radian
rad
-
-
solid angle
steradian
sr
-
-
Derived Units with Special Names
frequency
hertz
Hz
-
1/s
force
newton
N
-
kg-m/s2
pressure, stress
pascal
Pa
N/m2
kg/(m-s2)
energy, work, heat
joule
J
N-m
kg-m2/s2
power, radiant flux
watt
W
J/s
kg-m2/s3
Other Common Derived Units
acceleration
meter per square second
m/s2
-
m/s2
angular acceleration
radian per square second rad/s2
-
rad/s2
angular velocity
radian per second
rad/s
-
rad/s
area
square meter
m2
-
m2
density, mass density kilogram per cubic meter kg/m3
-
kg/m3
energy density
joule per cubic meter
J/m3
N/m2
kg/(m-s2)
moment of force
newton meter
N-m
N-m
kg-m2/s2
specific energy
joule per kilogram
J/kg
J/kg
m2/s2
specific volume
cubic meter per kilogram m3/kg
-
m3/kg
specific weight
newton per cubic meter
N/m3
N/m3
kg/(m2-s2)
speed, velocity
meter per second
m/s
-
m/s
surface tension
newton per meter
N/m
N/m
kg/s2
viscosity, dynamic
pascal second
Pas
(N-s)/m2 kg/(m-s)
viscosity, kinematic
square meter per second
m2/s
-
m2/s
volume
cubic meter
m3
-
m3
volumetric flow rate
cubic meter per second
m3/s
-
m3/s