Research

When you release an inflated but untied balloon at rest, the gas inside the balloon (at high pressure)
rushes out the open end of the balloon. That escaping gas and the balloon form a closed system, and
so the momentum of the system is conserved. The balloon and remaining gas acquires a momentum
equal and opposite to the momentum of the escaping gas, and so move in the opposite direction to
the escaping gas.

What we found

⬇️Our question ⬇️

When you let go of an inflated balloon why does it fly around the room