Project: Balloon Rocket
Video Tutorial: balloon rockets
It’s all about the air…and thrust. As the air rushes out of the balloon, it creates a forward motion called THRUST. Thrust is a pushing force created by energy.
In the balloon experiment, our thrust comes from the energy of the balloon forcing the air out. Different sizes and shapes of balloon will create more or less thrust.
In a real rocket, thrust is created by the force of burning rocket fuel as it blasts from the rocket’s engine—as the engines blast down, the rocket goes up!
1. Tie one end of the string to a chair, door knob, or other support.
2. Put the other end of the string through the paper roll.
3. Pull the string tight and tie it to another support in the room.
4. Blow up the balloon (but don’t tie it). Pinch the end of the balloon and tape the balloon to the paper roll. You’re ready for launch.
5. Let go and watch the rocket fly!
Does the shape of the balloon affect how far (or fast) the rocket travels? Does the length of the straw affect how far (or fast) the rocket travels? Does the type of string affect how far (or fast) the rocket travels? Does the angle of the string affect how far (or fast) the rocket travels?
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