Marvin & Milo

Matching movement

Matching movement



What you need:

A plastic cup

A match

A balloon

Two 1p coins



Lay one coin flat on a table and balance the other on it vertically. Balance the match on the rim of the upper coin then place the cup over the whole set-up.

Blow up and tie the balloon then rub it against your hair or jumper. Move the balloon slowly round the cup, without touching it.


Results & explanation

The match moves as the balloon does!

Rubbing the balloon transfers negatively charged electrons to it, repelling electrons in the match in a way that causes it to spin.

Friction acts along the whole match when it’s lying flat and stops it moving, but it can spin when it’s resting on a point.


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