1. The problem statement, all variables and given/known data A ball is dropped from the top of a building and falls vertically downwards. Air resistance can be neglected. After falling a distance d, the speed of the ball is v. Determine the speed of the ball (in terms of v) when it has fallen a distance of 2d. 2. Relevant equations 3. The attempt at a solution We tried to isolate for V2 and d and then substitute them into each other but that didn't work. Please help!