Adeflated hot air balloon weighs a total of 8000n filled with hot air the balloon rises to a height of 1000 m. how much work is accomplished by the hot

First of all, if it's filled with hot air, then there's no deflated balloon.

If a weight of 8,000N is raised to an altitude of 1,000 meters,

then 8 million Joules of work has been done.

Gravity does the work. The hot air doesn't.

If you filled the same balloon with the same hot air on the Moon,

the balloon would just lay there on its side on the lunar regolith

and look ridiculous, like some kind of enormous cloth light bulb.

The same hot air couldn't budge it an inch.

be subject to a force andchange its motion