{TAIL ~ The fixed distance} divided by the transit time is equivalent to {HEAD ~ the average velocity} of the ball over the fixed distance 
{ TAIL ~ The fixed distance } divided by the transit time is equivalent to { HEAD ~ the average velocity } of the ball over the fixed distance
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH