Marvin & Milo

Matching movement

 
Matching movement

 

 

What you need:

A plastic cup

A match

A balloon

Two 1p coins

 

Instructions

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.

 

See previous cartoons

Bubbles squared

Solid visions

Bottled tornado

Facing pressure

Mushrooming marshmallows

Take the money

Bubble bounce

Bead fountain

Jam jar session

Sixth-sense toy

Strange attraction

Impossible tower

Sinking sugar

Freezing time

Liquid strength

Mirror magic

Polar opposites

Unbalanced balloons 

Unsliced ice

Free fluid

Heavy atmosphere

Dogged drifter

Remote detector

Free fall ride

Electric slime

Pressure fountain

See more on physics.org

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