Posted by kelsey on Wednesday, October 8, 2008 at 12:42am.
(a) When air resistance can be ignored, the sum of potential and kinetic energy is constant. That means tht V^2/2 + g h is constant, where h is the height measured from any reference plane. (The mass M cancels out). Use that fact to solve for the initial velocity Vo.
28^2/2 = Vo^2/2 + g*35
(b) At the greatest height, V = 0. use the same approach to solve for Hmax
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