1. The problem statement, all variables and given/known data What minimum energy is required to raise a 1.7e3 kg vehicle from the surface of the moon to a height of 5.22e6 m? 2. Relevant equations Ep= -G(m1m2)/r 3. The attempt at a solution Ep(initial)= -6.67e^-11(1.7e^3 x 7.35e^22)/1.74e^6 = -4789750000 Ep(final)= -6.67^-11(1.7e3 x 7.35e^22)/6.96e^6= -1197437500 I have tried subtracting the final by the initial, but I am not getting the correct answer of 3.6e^9 J.