I'm trying to solve a "riddle" which is a bout shooting a cannonball above a hedge with a heigth of 30 meters. My goal is to hit a target on the other side of the hedge, at least 600 meters from the point where the cannon is located. The speed of the cannonball is approximately 100meters/second. The weight of the cannonball is irrelevant. I'm looking the optimal angle and distance. Can't move closer than 600. So I have length = 600m or further Speed leaving cannon = 100m/s Cannonball has to gove above the heigth 30m. And I´m looking for the best angle. Or just an angle that will do the job.. It's been a long time since I read about physics, so I'd be very thankful if someone could freshen my memory a bit. I don't remember the formula for these type of calculations.