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The CD Balloon Hovercraft

Purpose

My purpose is to see how far a CD balloon hovercraft will go with a push, compared to a push with air under the hovercraft sustaining it.

Hypothesis

I think that a hovercraft with air sustaining it will go farther with a push rather than pushing a hovercraft with no air sustaining it.

Apparatus

  • balloon
  • CD
  • strong glue
  • pop-top 
  • lidruler


Method

1) Put the balloon over the pop-top lid.

2) Open the pop-top lid and blow through it, blowing up the balloon, then closing it.

3) Put some strong glue (I used a glue gun) around the bottom rim of the pop-top lid and glue it to the center of the CD, cover the hole.

4) Push opens the pop-top lid, and the hovercraft glide!

Observations

1) I placed the hovercraft on a level table and gave it a slight push. The distance was 40 cm.

2) I pushed the hovercraft again, this time with air sustaing the hovercraft. The distance was 77 cm.

Conclusion

My hypothesis was right. The layer of air between the CD and the tabletop greatly reduces the amount of friction between the two surfaces. So the CD hovercraft can glide across the tabletop easily  and further with the same amount of force in a push.

Project Done By Samuel Wang
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