1. The problem statement, all variables and given/known data If a person drops a 20kg ball from a height of 50m. What is the speed of the ball before it hits the ground? Neglecting air resistance. 3. The attempt at a solution I'm not sure if this is a trick question. The formula I would use to solve this is final velocity = initial velocity + (at). I think that a would be 9.8 as its the speed of gravity but I don't have the time. Am I using the correct formula?