demonstrations:the_tablecloth_trick
The Tablecloth Trick
Materials: ★☆☆ Easy to get from supermarket or hardware store
Difficulty: ★★☆ Can be done by science teachers
Safety: ★★☆ Some safety precautions required to perform safely
Categories: Motion
Alternative titles: Newton’s First Law Tablecloth Demonstration, Inertia Tablecloth Pull
Summary
A tablecloth is pulled quickly from under cups and plates, leaving them in place.
Procedure
- Prepare an old tablecloth by cutting off the seam or hem so it will slide smoothly.
- Lay the tablecloth flat on a table.
- Place a plate and a few cups of water on top of the cloth. (Start with plastic dishes before trying glass.)
- Stand back, grip the tablecloth near the edge, and pull straight down and fast.
- Observe how the dishes remain in place while the tablecloth slides out.
Links
Tablecloth Demonstration - The Physics Classroom:
Demonstrating inertia with a table cloth Science Minute:
📄 The Tablecloth Trick - She Loves Science: https://shelovesscience.com/the-tablecloth-trick/
📄 Tablecloth Whip-off Trick - Steve Spangler: https://stevespangler.com/experiments/tablecloth-science-trick/
Variations
- Use different types of tablecloths (thick, thin, slippery) to compare effects.
- Increase the weight of the objects on top (adding books, heavier cups).
- Try pulling the cloth slowly vs. quickly to observe differences in friction and inertia.
Safety Precautions
- Start with plastic dishes and cups of water to prevent breakage and spills.
- If using glassware, ensure adult supervision and keep towels ready for cleanup.
- Perform on a stable, flat table to reduce accidents.
Questions to Consider
- Why do the cups and plates stay in place when the tablecloth is pulled quickly?
- What happens if you pull the tablecloth slowly instead of fast?
- How does friction play a role in this demonstration?
- How is this similar to the Egg Drop Inertia Challenge?