Hmm, i have this cenario, there is a cannon and it's target, separated by a distance d, not necessaraly in the same heigh. what i need is a function that gives the velocity needed for the cannon ball reaches the target. PS: consider the angle 45°, there is wind velocity, but not air resistance. The wind velocity is only horizontal, in favour or against the launch, I'd like a function for each of these two wind velocity possibilities. Thanks in advance.