## Question

###### Two heavenly bodies both with radii of 4×103 miles and masses of 8×1024 kg are separated...

Two heavenly bodies both with radii of 4×10^{3} miles and masses of 8×10^{24} kg are separated by 4×10^{7} miles. They are initially at rest. Assume that you can ignore any effects having to do with the existence of atmospheres and that nothing significant exists in the space between the planets.

Consider the same setup as before, only one planet is twice the mass of the other (their radii are still the same size). What is the speed of the more massive planet just before their surfaces collide?

## Answers

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