Can we make a car go by using a balloon for power? Check out our experiment below to get to the bottom of this intriguing question. Plus, fill out the form on this page to grab your free recording sheet to share this Balloon-Powered Car Experiment with your class.
How does the Balloon-Powered Car Experiment work?
The concept behind the experiment is that energy stored when the balloon is inflated is released as air pushes out, which then propels the toy car forward to make it seem as if it is moving on its own.
What does the Balloon-Powered Car Experiment teach?
This experiment demonstrates basic principles of physics, including air pressure and propulsion. As the air escapes the balloon, it creates a force (thrust) that propels the car forward. This demonstrates Newton’s third law of motion: “For every action, there is an equal and opposite reaction.”
Is there a Balloon-Powered Car Experiment video?
This video shows detailed step-by-step instructions in a visual way to master the experiment.
Materials Needed
To do the Balloon-Powered Car Experiment, you will need:
- A small toy car (with wheels that roll freely)
- 1 balloon
- 1 drinking straw
- Tape (any type that can hold the materials securely)
Our free recording sheet is also helpful—fill out the form on this page to get it.
Balloon-Powered Car Experiment steps:
1. Prepare the balloon.
Inflate the balloon slightly and let the air out a few times to stretch it. Slide one end of the balloon onto the straw’s tip, leaving enough straw exposed for the air to escape. Secure the connection with tape to create an airtight seal.
2. Attach the balloon setup.
Tape the straw (with the balloon attached) firmly to the top of the toy car. Position the straw so that it extends slightly over the edge of the car, allowing the balloon to inflate above the car.
3. Inflate the balloon.
Blow air into the straw to inflate the balloon while it’s attached to the car. Pinch the straw to prevent air from escaping.
4. Release and observe.
Place the car on a flat surface, release the straw, and watch the car move forward as the balloon deflates.
Get my free balloon-powered car experiment printable!
If you are ready to try our experiment with your class, grab our printable balloon-powered car experiment worksheet to pair with your lesson.
Looking for more experiment ideas? Check out our big list of experiment ideas here.
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