Which weights would you use on a single thread to create a 6.86n force

6.86 N = (mass) x (9.8 m/s²)

Mass = (6.86 N) / (9.8 m/s²)

Mass = (6.86 kg-m/s²) / (9.8 m/s²)

Mass = (6.86/9.8) kg

Mass = 0.7 kilogram

I would use the 500-gram weight and the 200-gram weight, and hang them both from the end of the thread.  Then the total mass on the end of the thread is 700 grams.  When I take it to Earth, it will weigh 6.86 N .

the device is called “ rocket engine”

you go to your settings preference and in the end youll see sth that says "i want to delete my acc" click on it and u'll acc will be deleted but u have to wait.