Posted by Anonymous on Saturday, December 12, 2009 at 3:54pm.
Actually, the time to fall is
T = sqrt (2H/g).
That seems to be what you did, but you were incorrect in writing
-0.25 = .50
Also since you are measuring distance down, forget the minus sign.
Once you get the time T, use
T = D/Vx to get the horizontal velocity, Vx.
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