1. The problem statement, all variables and given/known data What is the velocity of an object dropped from a height of 300 m when it hits the ground? 2. Relevant equations s(t) = s0 +v0t -1/2gt2 v(t) = v0 - gt s0 = initial height v0 = initial velocity v(t) = s'(t) 3. The attempt at a solution Attempted this for a while, can't seem to get it right. I know initial height = s0 = 300m. g, as given by the book = 9.8 (represents gravity) I understand that when trying to find maximum height, velocity = zero. For this, I assume maximum velocity is found when s(t) = zero. Should I believe that when s0 = 300, v0 and t = zero?