Simple throwing ball "up" problem 1. The problem statement, all variables and given/known data Ball is thrown vertically with upward velocity of 18m/s when it reaches 1/4 of its maximum height above its launch point. Find initial launch velocity of ball. 2. Relevant equations 0.5mv2, mgh, v=d/t 3. The attempt at a solution The 1/4 of the maximum height is throwing me off. I tried using kinematics equations to first solve for the first part of the throw (the 1/4) and then use final velocity of zero at the max height using deceleration of gravity to find this height. I'm stumped, any help is appreciated. Thanks.