1. The problem statement, all variables and given/known data A projectile is shot straight up from the earth's surface at a speed of 1.10×10^4 km/hr 2. Relevant equations mgh=.5mv^2 3. The attempt at a solution I converted the speed to m/s and 3055.5556 m/s masses cancel out so i get 9.8h=.5v^2 I plugged in v and solved for H and got 476347.95m, which was wrong. I'm not sure if this is how you are supposed to solve this problem, but i can't think of any other ways.