1. The problem statement, all variables and given/known data A ball is kicked with initial velocity 40 m/s at an angle of 37 degree above the horizontal. What is the time (in seconds) needed to reach the maximum height? 2. Relevant equations Y-axis h= Voy t - 0.5 g t^2 Vy= Voy - g t Vy^2= Voy^2 - 2 g h X-axis d= Vox t Vx= Vox 3. The attempt at a solution I reached to a point where I couldn't figure out a way to continue.. I used this equation h= Voy t - 0.5 g t^2 h= (40 sin(37)) t - 5 t^2 I have 2 unknowns.. I tried to use Vy=Voy - g t to find the time, I got so far these 2 equations h= (40 sin(37)) t - 5 t^2 0=(40 sin(37)) - 10 t Is this right?