RelativeVelocity
2D/3D

• RelativeVelocity[bnum, point] returns the velocity of point, relative to body bnum, in global coordinates.
• RelativeVelocity accepts the Coordinates option to determine whether to return the result in Global or body Local coordinates.

• The default option setting is Coordinates->Global.
• RelativeVelocity is a generalization of the Velocity function that can return the velocity of a point relative to some reference frame other than the global reference frame.
• RelativeVelocity[1, point] is identical to Velocity[point].
• See also: Acceleration, Location.

Further Examples

Load the Modeler2D package and define a simple model.

In[1]:=

Here is an expression representing the velocity vector of a point at {0, 5} on the crank with respect to an instantaneously coincident point on the link.

In[2]:=

Out[2]=

Here is the relative velocity expressed in the local coordinate system of the link.

In[3]:=

Out[3]=

See HelpModel2D.