1. The problem statement, all variables and given/known data I just came across this question and i think its giving me a real hard time. This is part of a bigger question so I'll provide the other statements below 7 The maximum height reached by the ball is approximately (1) 1.2 m (3) 4.9 m (2) 2.5 m (4) 8.5 m 2. Relevant equations t=1 s and therefore half way is 0.50s V(i)=8.9m/s angle is 35 degrees Viy= 4.9m/s 3. The attempt at a solution First of all, why is it that I can't use certain formulas in Solving some motion problems even though everything seems to work ok. I tried using this formula....d=V(i)t +1/2at^2... but my answer turns out wrong. and this one rather gives me the answer...Vf^2=Vi^2 + 2ad.......why is that?