- CD's- These will function as our wheels. Since the mass is evenly distributed throughout, they will have less rotational inertia, and will hopefully go quite fast.
- Wooden Skewers- These are thin enough to fit into our eye hooks, so they should work well as axis.
- Paper Towels- We will use paper towels to wrap around the skewers, which will fill in the gap between the inside of the wheel and the skewer.
- Tape (lots of it)- We will use tape to secure not only the paper towels to the Skewers, but also to secure the wheels to the paper towels.
- A rubber band- Instead of a string to act as the lever arm force for the car, it should provide extra force since it is stronger.
We also faced new challenges in building our new design. Here are a few:
- The skewer would not stop rotating from left to right: To fix this, we put heavy layers of tape on the skewer in between the eye hooks, to act as an anchor, and keep the skewer in place. This worked very well.
- The CD's were touching each other: To combat this, we aligned the CD's so that the back wheels were farther apart than the front wheels. This kept them from rubbing against each other.
- The rubber band would not move the car: We decided to switch our tactic and tape two skewers together to create a long lever arm. Then we taped this to the lever on the mouse trap to create the lever arm system. We tied a quadruple over-under knot on the lever, then taped over that for safety. We did the same on the back axis.
- The Lever Arm came off of the mouse trap lever: To fix this, we simply applied more tape and made it sturdier.
- The lever system did not move the car: We still need to find a solution to this problem. We believe that the wheels are not sticking to the axis, therefore when the axis turn very fast, the wheels cannot keep up and simply stay put while the axis turns quickly inside the wheels. To fix this, we may need to completely change the way we keep the wheels on the axis.
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