A 1kg block rests on earth's surface. How much energy is required to move the block very far from the earth, ending up at rest again?
U = -G(m1m2)/r
Uf-Ui= -W (W= work internal)
The Attempt at a Solution
I know that my final potential energy will be zero, and because the object ends at rest i can say my final kinetic energy will also be zero. Not sure where to go from here, or what equation to use.