1. A ball is thrown vertically upward with an initial velocity of 27.0 m/s. Neglecting air resistance, how long is the ball in the air? 2. Relevant equations vf (v final) = v0 (v initial) + at 3. The attempt at a solution I set final velocity equal 0. So.. 0 = 27.0 m/s (initial velocity) + (-9.8 m/s2)t -27.0 m/s divided by -9.8 and it turned out to be equal to 2.76 seconds. What am I doing wrong here? I saw a similar thread and the problem was solved the same way; but apparently my answer is incorrect.