• Typed Vector—A typed vector is a vector defining direction in three dimensions that you can specify with a Cartesian set of axes x, y, and z. Choose a rigid body and enter coordinates to indicate the direction of the vector. The direction is relative to the origin of the selected rigid body coordinate system. You can select the WCS or a rigid body coordinate system.

• Straight edge, curve or axis—Select a straight edge, a curve, or a datum axis in the assembly to define the direction of the velocity vector.

• Point to Point—Select two rigid body points or vertices, one for the origin of the vector and another to indicate the direction. If one of the two selected points is not a point to which you are applying the initial condition, then the velocity vector is parallel to the line between the two points.