Basic Units
Length
1 Meter
[m, cm, km]
System of Units
1 Second
[sec, msec]
Mass
1 Kilogram
[g, kg]
Mass of C atoms
(Original kg in Paris)
3
[1 kg/m ]
[Newton] 1 N = 1 kg m /sec
2
Force = Mass * Acceleration
Density = Mass/Volume
Frequency of Cs atoms
Time
Based on: Wavelength of light of Kr atom
(Original m in Paris)
Derived Units
[1 m/sec]
2
Area = Length * Length [1 m ]
3
Volume = Length * Length * Length [1 m ]
Velocity = Length/Time
2
Acceleration = Velocity/Time [1 m/sec ]