We have the following objects:
- a 80 kg person
- a rope of negligible weight
- a balloon filled with helium, which can lift for around the same weight, 80kg.
My question is, which of the following outcomes will occur (without considering weather conditions)?
- The balloon can actually lift a bit more than 80 kg.
- The balloon cannot lift more than 79.9 kg
Most importantly, suppose this person manages to do a 10 meters jump, on the way down, would he accelerate too fast for a "safe" landing?