• Orange
• Coffee Mug
• Matchbox Cover
• Postcard or Index Card
Steps:
1. Place the postcard (index card) on top of
the coffee mug.
2. Position the matchbox cover in the center of the card.
3. Balance the orange on top of the matchbox.
4. Quickly pull the card away.
What happened to the orange? The orange drops
into the coffee mug. Because the orange is heavy, it drops into
the mug and because the card and matchbox cover are light they gather
speed and move away.