Posted by Pankaj kumar suman on Sunday, December 23, 2012 at 10:05am.
0 = -.5 g (40^2) + Vo(40) + 500
solve for Vo (the throwing velocity)
Vo / g is the time to max height
40 - (Vo / g) is the free fall time
(40 * g) - Vo is the impact velocity
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