1. The problem statement, all variables and given/known data A watermelon with a mass of 2.0kg falls out of a tree house that is 5.4m above the ground. What is the speed of the watermelon just before it hits the ground? 2. Relevant equations Δh = (vi^2 - vf^2)/2g Eg = mgΔh Ek = 1/2mv^2 3. The attempt at a solution I tried two different attempts at this one. The first involves rearranging the first equation to solve for the final velocity, since the watermelon is falling out of the tree fort I assume the initial velocity is 0. On my actual answer I would show the calculations, but I got the answer v = 10.3 m/s My other attempt (which I'm not sure actually applies to this) is to figure out the gravitational potential energy, and then assume that because the watermelon is hitting the ground that all of that energy would be converted into kinetic energy, so then I could solve for velocity. Doing this, I got the same answer. So I could use either method?