Man in a Balloon Homework: Velocity & Movement

[VitaX]

Homework Statement

a man with mass m hangs from a rope from an air balloon with mass M. the air balloon is not moving with respect t the ground.
In what direction and what is the magnitude of the velocity to the balloon if the man starts climping the rope with a velocity v with respect to the rope?
What happens with the movement of the system when the man stops climing?

Homework Equations

Not sure what equations are relevant

The Attempt at a Solution

I have no idea how to approach this, if anyone could give me some hints on how to solve this, that would be great.

 

[tiny-tim]

Hi VitaX!

The man-and-balloon is a closed system with no external forces (or to be precise the extrernal forces are gravity and air pressure, and they balance out to zero) …

soooo … ? ​