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**1. Homework Statement**

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. Homework 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!