21. Upon reaching a predetermined staging time, location, and velocity vector the aircraft releases the Pegasus. 22. Because the acceleration vector turns along with the velocity vector , they remain perpendicular to each other. 23. More precisely, the vorticity is a pseudovector curl ( rotational ) of the flow velocity vector . 24. The velocity vector of the center of mass is always perpendicular to the ground reaction force. 25. The velocity vector is the unit tangent vector. 26. Thus, in this case, the velocity vector is: 27. Hence, normal velocity vectors are not averageable. 28. This sideslip flow then produces a force in the horizontal plane to turn the vehicle's velocity vector . 29. That little energy interchange permitted the velocity vector to change but the kinetic energy to be conserved. 30. Thus, the tangential angle specifies the direction of the velocity vector , while the speed specifies its magnitude.
