Cyber LEGO® Club - Balloon-Powered Vehicle Challenge!
Hello Builders! Today's challenge is to build a balloon-powered vehicle!
The Science Behind It:
In this construction, you will be exploring Newton's Third Law of Motion: For every action (force) in nature, there is an equal and opposite reaction. The action is the air escaping from the balloon pushing against the air behind the car. The reaction is the air behind the car pushing against the car with the same force causing the forward movement of the vehicle (opposite direction with an equal force).
Here are a few things to think about while engineering your design.
- Balloon powered vehicles use KINETIC ENERGY.
- The 2 forces at work are friction and air resistance.
- You need to direct and maximize your propulsion. (Sometimes a straw or tube in your balloon can help.)
- Think: lightweight, low to the ground, aerodynamic, balance, and stability.
- Bigger wheels cause less drag than smaller ones (most often). Spacing is also important.
- Find an effective way to attach your balloon. Test your design. What modifications can you make to increase your speed?
- In the picture, I used a pinch clip (chip clips or clothespins work, too) to keep the balloon inflated while I moved the vehicle (easier than constantly holding it). The turbo rocket boosters looked cool, but all they did was slow me down. After tinkering and tweaking, I had a super-fast flat car!
Take things to the next level! Did you know, with some minor adjustments, you can turn your balloon vehicle into a stunt vehicle?
Make your design cyclone spin! Try some super turbo wheelies! IT'S AWESOME!