1. The problem statement, all variables and given/known data: The trajectory of a projectile in a vertical plane is y = √3 x - (1/5)x2, where x and y are respectively horizontal and vertical distances of the projectile from the point of projection. Find the angle of projection and speed of projection. 2. Relevant equations: 2-Dimensional Equations and maybe calculus. 3. The attempt at a solution: Honestly, I can't even understand that how do I begin with this question. I've tried some wild attempts but they landed me no where :-( Can you please guide me with the solution to this question?