Top Four Successful Modifications
1. Adding tubes of tape in the CDs' holes
This modification kept the wheels stable allowing the car to build up more speed becuase it wasn't wobbling around. The car went 8.1 feet with this modification.
2. Adding rubber bands to the wheels
The rubber bands allow the wheels to have more tension than if it was just the plastic CD material. The added traction lets the car get more grip on the road and go further. The car went 6 feet with this modification.
3. Moving the rubber band further back on the cardboard
This modification drastically increased the amount of elastic potential energy that could be built up by winding the rubber band around the skewer. This was due to the fact that more tension could be exerted on the rubber band becuase of the larger distance between the rubber band and the skewer. The car traveled 16 feet with this modification.
4. Adding the stick onto the back and placing the rubber band onto it
Placing the stick on the back of the car lifted the cardboard off the ground, and caused less friction to be present. Also, moving the rubber band onto the stick allowed for even more elastic potential energy to be built up because of the larger amount of tension on the band. This modification allowed for our car to travel 27 feet.