Mechanical Engineering Units and Quantities

Where:

Length = L
Mass = M
Time = T
Current = Q/T
Charge = Q

Description	Dimensions	Derived Units
Acceleration	LT^-2	meter/sec²
Angle	0	radian
Angular Accleration	T^-2	radian/sec²
Angular Momentum	ML^-2 T^-1	kgm-meter²/sec
Angular Velocity	T^-1	radian/sec
Area	L²	meter²
Energy	ML²T^-2	joule
Force	MLT^-2	newton
Frequency	T ^-1	cycle/sec
Gravitational Field Strength	LT^-2	newton/kgm
Length	L	meter
Mass	M	kilogram
Mass Density	ML^-3	kgm/meter²
Momentum	MLT^-1	kgm-meter/sec
Power	ML²T^-3	watt
Pressure	ML^-1T^-2	newton/meter²
Time	T	second
Torque	ML²T^-2	newton/meter
Velocity	LT ^-1	meter/sec
Viscosity (Dynamic)	ML^-1T^-1	kgm/meter-sec
Viscosity (Kinematic)	L²T^-1	meter²/sec
Volume	L³	meter³
Wave Length	L	meter
Work	ML²T^-2	joule

From these basic units useful derived units have been defined.

Unit	SI name	SI symbol	Relationship	SI basic units
frequency	hertz	Hz	-	s^-1
speed, velocity	-	-	-	m / s
plane angle	radian	rad	-	m x m^-1 = 1
angular velocity	-	-	rad / s	s^-1
acceleration	-	-	-	m / s²
angular acceleration	-	-	rad / s²	s^-2
area	-	-	-	m²
volume	-	-	-	m³
mass density	-	-	-	kg / m³
specific volume	-	-	-	m³ / kg
force	newton	N	-	kg x m x s^-2
work, energy, heat	joule	J	N x m	m²x kg x s^-2
pressure, stress	pascal	Pa	N / m²	m^-1x kg x s^-2
power	watt	W	J / s	m² x kg x s^-3
electric potential difference, EMF	volt	V	W / A	m² x kg x s^-3 x A^-1
electric resistance	ohm	Ω	V / A	m² x kg x s^-3 x A^-2
electric conductance	siemens	S	A / V	m^-2 x kg^-1 x s³ x A²
current density	-	-	-	A / m²
electric charge	coulomb	C		s x A
capacitance	farad	F	C / V	m^-2 x kg^-1 x s⁴ x A²
magnetic flux	weber	Wb	V x s	m² x kg x s^-2 x A^-1
magnetic flux density	tesla	T	Wb / m²	kg x s^-2 x A^-1
magnetic field strength	-	-	-	A / m
inductance	henry	H	Wb/ A	m² x kg x s^-2 x A^-2
Celsius temperature	degree Celsius	°C	-	K

Prefixes can be added to indicate multiples of the basic SI unit.