1. The problem statement, all variables and given/known data Ignoring air drag, how fast must you toss a ball straight up for it to take 2 seconds to return to same level you threw it from. 1. 20 m/s 2. 7.5 m/s 3. 15 m/s 4. 5 m/s 5. 10 m/s 2. Relevant equations vf = vi + a x t 3. The attempt at a solution To me this problem seems unsolvable as I have no idea about the distance the ball needs to travel, all I have is total time (2 seconds) and it acceleration on the way down, as if the ball is tossed upwards its acceleration will be different to - 9 .8m/s^2 ( I think?). I don't want to be given the answer I just want to be pushed into the right mindset of thinking. Thanks.