Experiment
Jet powered box
Can you make a shoebox move with just air from a balloon?
You need:
- A round balloon.
- 15 straws.
- A shoebox.
This is what you do:
Legg sugerørene ved siden av hverandre.
Lag et hull på den ene kortsiden av skoesken.
Blås opp ballongen.
Hold for åpningen og tre ballongen gjennom hullet i esken.
Sett skoesken oppå sugerørene og slipp ballongen.
Do the experiment once more, but this time without using a straw.
Explore further:
What is going on?
The straws reduce the friction (resistance) between the carton and the floor.
Without the straws, the friction becomes so great that there is not enough force from the balloon to push the shoe box forward.
