1. The problem statement, all variables and given/known data Consider 3 ball bearings, one with a mass of 8g, one with 16g, and one with 32 g. What heights should the 3 ball bearings be dropped from so that all 3 ball bearings have the same velocity? 2. Relevant equations I think that the relevant equation would be: vf^2= vi^2 + 2ad 3. The attempt at a solution I know what the initial velocity is 0m/s, and of course the acceleration. I thought that I could just solve for the distance easily by isolating d, the distance however i don't have the final velocity and i'm not sure if i need to be using the mass of the weights (since reglecting air resistance would have the same acceleration/ free fall regardless of mass). If anyone can lead me in the right direction and show me where I'm going wrong that would be greatly appreciated! Thanks a lot!