If you are in an airplane encountering turbulence and you start feeling sick to your stomach, would closing your eyes ? why? no. it will focus you

     Yes; it eliminates the disagreement between the information from your inner ears and the information from your eyes. 
        Yes; it eliminates the disturbing information that you are falling and bouncing through the sky. 
        No; it focuses your attention on the nausea. 
        No; it intensifies the feeling of falling and bouncing by eliminating the sight of the stable cabin. 
        Yes; it calms you by allowing the sensory information from your chemoreceptors to properly readjust.

Velocity is the speed of an object in a certain direction so you'd need to know speed and direction