Yeah, like working out the thrust the huge rocket needed to leave the moon and return to earth . . . .
Well let's investigate. Thrust to weight ratio > 1. Air resistance lowering on a curve as you increase altitude, not ignoring dynamic pressure for a given speed and altitude plus weather conditions. Again, calculus is your friend. Next you tell me you can't make a glider with a sheet of paper and tape a bottle rocket to it.
In reply to
to leave the moon and return to earth . . . .
you write
Air resistance lowering on a curve as you increase altitude,
OK. I think it's becoming clear here.
OTOH, the moon has only 1/6 of the gravity of Earth, so "huge rocket" isn't needed.
No one ever seems to remember the thrust needed to slow down in space. The fuel required to create the thrust for the trip has to be doubled to allow for the slow down.
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