Hi there, I'd really, REALLY appreciate a hint for solving the following projectile motion problem. "A ball is thrown upward at an angle from a point on a horizontal plane. 10 meters away from that point is a wall. The ball strikes the wall perpendicularly at a height of 4.9 meters. (1) Determine the time from throwing the ball to it hitting the wall. (2) Determine the speed at which it hit the wall. (3) Determine the initial velocity." I can't get a handle on this because the initial velocity/angle isn't given. If the ball strikes perpendicularly, that means it's at the top of the trajectory and Vy, or the upward velocity of the projectile, will be 0.0 m/s. Does that sound right? Where do go from here?