How does air pressure make bottle rocket fly?

Answer 1

Because the high air pressure inside the bottle is trying to go to the lower air pressure outside the bottle, after more air is pumped in until the pressure builds up too much, the bottle rocket will be force into the sky by the air inside it.

Answer 2

Normally small fireworks like bottle rockets use black powder as a solid propellant. Black powder has a lot of chemical energy stored inside of its molecular bonds. When you apply a spark or flame to black powder, the black powder combines with the O2 in the air and a lot of heat energy is released. When a gas goes from room temperature to very hot very quickly, it suddenly takes up much more space. If you have two gases that are exactly the same, the one that's hotter will have more volume (it takes up more space). Inside the bottle rocket, as the gas expands it pushes out in all directions, normally in a rocket engine like a bottle rocket it only has one direction to come out, the bottom. When it shoots out the bottom the gas is moving very quickly, and even though the gas doesn't weight much, it's being pushed away so fast that the rocket (which is much heavier) get's pushed in the opposite direction, forward.

Just to sum it up, heat starts a chemical reaction, chemical reaction makes more heat, gas expands, pushes out the bottom and pushes the rocket up, up and away.

Answer 3

Air pressure builds up inside the bottle rocket when water and air are pushed in before launch. When the pressure reaches a certain point, the bottle rocket releases the built-up pressure by pushing out the water out of the rocket, creating a thrust force that propels the rocket into the air.

Answer 4

# Thrust # Inertia (as opposed to gravitation, which is not a force) # Atmospheric Drag

Answer 5

Thurst & Gravity & Air resistance

Answer 6

thrust, drag, gravity