2. Combination of plastic tubing, PVC pipes, surrounding supportive wooden structures, and duct tape.

4. Gravitational potential energy was converted to kinetic energy. Main energy loss was due to the surface friction of the plastic tubing and impact during change of direction of PVC pipes. Inertia is absorbed into the flexible tubing.

5. The bending of the plastic tubing caused the potential for the ball to get stuck. Steel wires did not hold tubing as well as hoped, so duct tape was used. The ride occupant not have a very spherical shape. Drill battery was quite dead and not useful. Overall design had little issues and worked fairly well.

6. Irregular design causes problems with calculations. A lot of gravitation potential and kinetic energy is needed for any form of a loop. The design was constructed successfully and accomplishes the goal of a ball lasting as close to 15 seconds as possible.