1. The problem statement, all variables and given/known data A 4.0kg ball is thrown vertically up into the air with an initial velocity of 8.5ms−1 . By the time it is height h metres above the starting point, it has a velocity of 3.0ms−1 and has done 4.0J of work against air resistance. Find h. 2. Relevant equations Work done = force x distance 3. The attempt at a solution Work/force = distance. I have the work done, I need the force. Force = 4kg * [ (3 - 8.5) / t ] How am I supposed to find t without the distance?