1. The problem statement, all variables and given/known data Object falls from a tree which is 3m above the ground, what is its velocity when it hits the ground ? 2. Relevant equations mgΔh=1/2mv2 or s=vt-1/2at2 3. The attempt at a solution Using the idea of PE=KE, as the masses cancel out I get an answer of V=7.66ms-1 However I thought that this question can also be done with a suvat equation, I use the same condition which is used for KE [That U=0]. When attempting with suvat I get an answer of 17.15ms-1 why is that ?