1. The problem statement, all variables and given/known data A rocket is launched straight up from the earth's surface at a speed of 1.80×104m/s . What is its speed when it is very far away from the earth? Answer in m/s 2. Relevant equations K1+U1=K2+U2 3. The attempt at a solution .5mV1^2-(G*m*Me)/r= .5mV2^2-(G*m*Me)/r *** THe mass of the rocket should cancel out and the U1 aka (g*m*Me)/r should be zero. you are left with: .5V1^2=.5V2^2-(G*m*Me)/r *** Now solve for V1 V1 = Square root of [ (.5V1^2+(GMe)/r)/.5 ] I got 1.06 *10^4 what am I doing wrong? I know that you have to use conservation of energy and assume that since the rocket is traveling a very far distance the final potential energy is going to be zero. Could it be calculator issues?!?!?!