The instruments attached to a balloon have a mass of 5kg. The balloon is released and exerts an upward force of 100 N. After the balloon has accelerated for 10s, the instruments are released. What is the velocity of the instruments at the moment of release?

Answer 1

I am wondering if "upward force" means net upward force, I assume so. weight is already in the number

vf=at=force/mass * time=100/5 * 10=20m/s