A package of mass 6 kg sits at the equator of an airless asteroid of mass 9.0 1020 kg and radius 5.9 105 m.

A package of mass 6 kg sits at the equator of an airless asteroid of mass 9.0 1020 kg and radius 5.9 105 m. We want to launch the package in such a way that it will never come back, and when it is very far from the asteroid it will be traveling with speed 181 m/s. We have a large and powerful spring whose stiffness is 2.8 105 N/m. How much must we compress the spring?

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