• 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 body and enter coordinates to indicate the direction of the vector. The direction is relative to the origin of the selected body coordinate system. You can select the WCS or a 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 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.