trouble calculating a projectile's height after a certain distance 1. The problem statement, all variables and given/known data A pebble is fired from a slingshot with a velocity of 30.0m/s. If it is fired at an angle of 30deg to the vertical, what height will it reach? If its fall is interrupted by a vertical wall 12m away, where will it hit the wall in relation to the starting position of the pebble in the slingshot? 2. Relevant equations VF2 = Vo2 + 2ad and the 3 other uniform acceleration equations, i guess. 3. The attempt at a solution ok, so i used the above equation to solve for d 0=[(30)(cos60)m/s]2 + (-9.8m/s)d d = 34.44m ~approx my trouble comes when i try and calculate how high the pebble will be after 12 meters. if i understand correctly, the question is asking how high up the wall will the pebble hit if it is 12 meters away. regardless, i am having difficulty creating an equation to solve for that. it may be interesting to note that i dont know whether the ball will have passed 12m by the time it goes 34m up; however, i assume it will be beyond 12m horizontally, so the ball will still be going up when it hits the wall at 12m. i greatly appreciate any help.