Stuck on these hw problems. 1. A ball is launched 60 degrees above the x axis to a helicopter that is 110 feet away and 90 feet high. What is the initial velocity required to reach it? I know the equation we have to use is 90 = viT + .5aT^2 and that 90 = vi(cos60)T 2. Another ball is launched with an initial velocity of 38 m/s and lands 29 meters away. Find the two angles that meet this. would you use the same equations?