View Single Post
Old 12-04-2012, 12:12 PM   #9
Bionic Poster
Join Date: Oct 2005
Posts: 34,388

Originally Posted by julian View Post
The spin axis and ball velocity vector were close to perpendicular regardless of serve type.
Was there a diagram for this? Since there can be two perpendiculars to the velocity vector in 3D, I would like to know which of those two was the spin axis.
sureshs is offline   Reply With Quote