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Homework #3 Correction
PHYS 521 Students,
One of you found an error in the Problem 7 (Sp.2008, PII-2).
The picture "Top View" has the wrong angle identified as psi.
Psi should be the angle between the radial vector and the
velocity vector of the paint at the point of intersecton (on the
rim of the wheel). I am sorry - but you do need this angle,
and the picture was in the original Exam!
Hisao Nakanishi