.. include:: definitions.rstinc

=============================
Physical Quantities and Units
=============================

Below is a table showing the units used to express different physical quantities within |AGXUnreal|.

.. csv-table::
   :align: center
   :widths: 3, 3
   :header: "Quantity", "Unit"

   "**Acceleration**",                ":math:`cm/s^2`"
   "**Angle**",                       ":math:`deg`"
   "**Angular velocity**",            ":math:`deg/s`"
   "**Angular acceleration**",        ":math:`deg/s^2`"
   "**Cohesion**",                    ":math:`Pa`"
   "**Compliance (rotational)**",     ":math:`rad/Nm`"
   "**Compliance (translational)**",  ":math:`m/N`"
   "**Damping, Spook***",             ":math:`s`"
   "**Damping (rotational)**",        ":math:`Nms/rad`"
   "**Damping (translational)**",     ":math:`Ns/m`"
   "**Density**",                     ":math:`kg/m^3`"
   "**Electric potential**",          ":math:`V`"
   "**Electric resistance**",         ":math:`Ohm`"
   "**Force**",                       ":math:`N`"
   "**Length**",                      ":math:`cm`"
   "**Mass**",                        ":math:`kg`"
   "**Moment of inertia**",           ":math:`kg m^2`"
   "**Pressure**",                    ":math:`Pa`"
   "**Speed**",                       ":math:`cm/s`"
   "**Stiffness (rotational)**",      ":math:`Nm/rad`"
   "**Stiffness (translational)**",   ":math:`N/m`"
   "**Torque**",                      ":math:`Nm`"
   "**Young's Modulus**",             ":math:`Pa`"

Spook damping is the damping used in AGX Dynamics and is the time in seconds a constraint have to fulfill its violation.

Generally, the unit of a certain property can also be seen in the Unreal Editor in the tooltip text. This is displayed by hovering the mouse cursor over the property of interest.

.. figure:: images/editor/editor_tooltip_unit.jpg
  :alt: Using tooltip to see the physical unit.
  :target: _images/editor_tooltip_unit.jpg

  The physical unit can be seen in the tooltip text.