Units

Base quantities

Physical Quantity Sym. SI Unit
Mass mm kg\mathrm{kg}
Length dd m\mathrm{m}
Time tt s\mathrm{s}
Current II A\mathrm{A}
Temperature θ\theta K\mathrm{K}
Amount of substance nn mol\mathrm{mol}
Luminous intensity IvI_v cd\mathrm{cd}

Derived quantities

Quantity Sym. SI Unit SI Base Unit Other Units
2.1 Kinematics
Speed/Velocity vv m s−1\mathrm{m\,s^{-1}} - -
Acceleration aa m s−2\mathrm{m\,s^{-2}} - -
 
3.1 Dynamics
Force FF N\mathrm{N} kg m s−2\mathrm{kg\,m\,s^{-2}} -
Momentum pp kg m s−1\mathrm{kg\,m\,s^{-1}} - -
Impulse Δp\Delta p N s\mathrm{N\,s} kg m s−1\mathrm{kg\,m\,s^{-1}} -
 
4.1 Forces and Equilibrium
Moment, Torque MM N m\mathrm{N\,m} kg m2 s−2\mathrm{kg\,m^2\,s^{−2}} -
 
4.2 Density and Pressure
Density ρ\rho kg m−3\mathrm{kg\,m^{-3}} - -
Pressure pp Pa\mathrm{Pa} kg m−1 s−2\mathrm{kg\,m^{-1}\,s^{-2}} -
 
5.1 Work, Energy and Power
Energy, Work EE, WW J\mathrm{J} kg m2 s−2\mathrm{kg\,m^2\,s^{-2}} kWh\mathrm{kWh}, cal\mathrm{cal}
Power PP W\mathrm{W} kg m2 s−3\mathrm{kg\,m^2\,s^{-3}} hp\mathrm{hp}