Lunar Carry-Off Luggage
The lifting force an astonaut can apply on Earth can be applied equally on the moon. The force to support 30 kilograms on Earth is determined from Newton's Law of Acceleration applied vertical to Earth:
The astronaut can apply this force to unload on the moon. Hence the mass that might be unloaded is:
Notice the two events have separate inertial reference points. This is not a problem because no motion is considered, only force.
Both Metric and English Engineering Units are used in the United States. English Engineering Units have a peculiarity as is demonstrated below.