1. The problem statement, all variables and given/known data A ball is thrown downward from a tower 65.0 m tall. If the ball takes 1.30 seconds to hit the ground, what was its initial velocity? The answer my teacher provides is 43.6 m/s, but I am having a problem reaching that answer. 2. Relevant equations Possibly Vi = Vf - aT? This is the equation I am trying to use, but the final velocity is not given, I don't think. 3. The attempt at a solution First, I tried Vi = 0 + 9.8 x 1.3, but obviously, it doesn't work. So whether there is information missing or I am using the wrong formula, I don't know. Any help would be appreciated!