To conserve momentum. Momentum before = momentum after.Dunno get your aerolas out and swing them about , since the balloon is not initially moving (when you hold the opening shut), the momentum before is mv, v = 0 so m(0) = 0 kgm/s. After you let go of it, the air pressure escapes backwards and pushes the balloon in the opposite direction,oh my god i.e. in the forward direction (Newton's 3rd law - reaction pairs). This mean that the air escaping has negative momentum and the balloon moving forward has positive momentum
The hot air inside the balloon expands, making the hot air balloon fly.
air is heavier than balloon, air rises
air is heavier than balloon, air rises
i think it takes a long time for a hot air balloon to fly
The hot air inside the balloon expands, making the hot air balloon fly.
Yes they were first to fly the first hot air balloon
Hot air balloons can pick up and fly from just about anywhere. As long as the surface is flat a hot air balloon can fly from it.
An aeronaut flies a hot air balloon
To produce the 'hot air' that goes inside the balloon to make it fly.
How to get the air into the balloon and how to make it fly.
hot air balloon
qualifying in a hot air balloon and a pilots license.