Posted by Stevens on Wednesday, November 14, 2012 at 1:38pm.
The time it takes the ball to fall a distance h = 0.91 m is
t = sqrt(2h/g) = 0.431 s
The horizontal velocity component while rolling (and while falling) remains
Vx = 0.77 m/0.431 s = 1.79 m/s
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