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Old 12-04-2012, 12:45 PM   #10
boramiNYC
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Quote:
Originally Posted by sureshs View Post
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.
axis can rotate maintaining 90 deg to the V vector. think topspin and slice or american twist.
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