Vortex Unit Conventions

Owned by Marc Lievin
Aug 20, 2024

Vortex® supports the SI system (International System of Units) also known as the MKS (metre, kilogram, second) system.

Some physical quantities typically used for rigid-body dynamics are shown in the table below:

Physical QuantityUnitSymbol
LengthMeterm
MassKilogramkg
TimeSecondsec
AngleRadianrd
Linear SpeedMeter per Secondm/sec
Linear AccelerationMeter per Second2m/sec2
Angular SpeedRadian per Secondrd/sec
Angular AccelerationRadian per Second2rd/sec2
ForceNewtonN
EnergyJouleJ
WorkJouleJ
PowerWattW
Torque (moment of force)Newton MeterNâ‹…m
Moment of InertiaKilogram Meter2kgâ‹…m2
Spring ConstantNewton per MeterN/m
Spring DampingMass per Secondkg/sec
Kinetic LossSecond per Masssec/kg