Conventions#
SI Units#
Unless specified, every quantities are expressed in International System units (SI):
Time: second (s)
Length: meter (m)
Angle: radian (rad)
Mass: kilogram (kg)
Force: newton (N)
Moment: newton-meter (Nm)
Power: watt (W)
Energy: joule (J)
Time as first dimension#
Unless specified, when a numpy array is used to express a quantity that varies over time, the time corresponds to the first dimension of the array.