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My question is what is the

*approximate*escape speed needed to completely escape the moon & earth's gravity.

Is it the sum of their individual Escape velocities? or is it one equation, with the radius' added and masses added?

Thanks

- Thread starter CaptainEvil
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- #1

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My question is what is the

Is it the sum of their individual Escape velocities? or is it one equation, with the radius' added and masses added?

Thanks

- #2

mgb_phys

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I would add the escape velocities, the value for the moon is pretty small anyway

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mgb_phys

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"assuming one wished to escape completely from both the moon and earth's gravity, what would the

- #6

mgb_phys

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Thats why I would regard it as a single object - and so for a first approximation add the escape Vs

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