While teaching Newton’s Third Law of Motion, teachers can build this simple Balloon Rocket (which is little different than usual Balloon rocket attached to string).
Teacher can start with simple balloon and try to show students how balloon trajectory is unpredictable. Then teacher can guide students to build this rocket and show how simple engineering concepts help in controlling trajectory of Balloon.
This experiment would help in following engineering concepts (on high level)-
Following things we would need to perform / make Balloon Rocket –
Air coming out of balloon provides thrust to this Rocket (Force to push rocket upwards against gravity). In real rocket , this is achieved by burning fuel. Gases escape out of nozzle, create thrust to push rocket upwards.
This step help us to build Rocket base which is critical for holding Balloon, Nozzle and adding stabilizer fins. In real rockets, every gram / ounce counts. Increase in weight means more thrust / force require to push rocket out of Earth's gravity. We have to keep a watch on how much weight we are adding to our Rocket.