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Show that Moon would depart for even if ...

Show that Moon would depart for even if its speed were incresed by `42%`.

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Moon would depart forever if its orbital velocity `upsilon_(0)` around Earth becomes equal to escape velocity `upsilon_(e)` of Earth.
`%` increase in speed `= (upsilon_(e) - upsilon_(0))/( upsilon_(0)) xx 100`
`= (sqrt(2gR) - sqrt(gR))/(sqrt(g R)) xx 100 ~~ 42%`
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