How much energy is required to move a 1070 kg object from the Earth's surface to an altitude four times the Earth's radius? Having problems with this question. I figure it would be GMm(1/r(final) - 1/r(initial)), with the final being 4x earth's radius, and initial being earth's radius. I plugged in the constants for G, and M(earth), but the answer i'm getting is wrong. Please help.