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Code Number: 1F20.34
Demo Title: Inertia of Rest - Coin/Card Snap - Daruma Otoshi
Condition: Good
Principle: Inertia of Mass
Area of Study: Mechanics
Equipment:
Inertia App., Note cards, Tissue Paper, Pennies, Tongue Depressor, Daruma Otoshi toy .
Procedure:
Set the demo up with a note card between the ball or marble and the cup. Hit the note card with the spring striker and the card will fly out from underneath the ball and the ball will fall straight down into the cup. (For more dramatic effect the instructor may try to pull a tablecloth from underneath some table settings. (PIRA Demonstration Bibliography 1F20.30).
Make a stack of pennies. Swing the tongue depressor against the bottom penny and the penny should shoot out leaving the stack intact.
The Daruma Otoshi is a stack of blocks with a small hammer. When stacked, you can knock the bottom block out of the stack without tipping over the rest of the stack.
References:
- Michael Vollmer, Klaus-Peter Mollmann, "Removing Coins from a Dice Tower: No Magic - Just Physics", TPT, Vol. 51, #4, Apr. 2013, p. 212.
- Mike Shaw, "I "Saw" Newton's Three Laws", TPT, Vol. 50, #8, Nov. 2012, p. 480.
- Martin Gardner, "Bottle, Hoop, and Dime", TPT, Vol. 32, #2, Feb. 1994, p. 80.
- T.P. Toepker, "Newton and the Apples", TPT, Vol. 26, #3, p. 165, March 1988.
- Alfred M. Eich, "Inertia Demonstration", TPT, reprints Apr. 1963-Dec. 1971, p. 162.
- Mario Iona, "Inertia", TPT, Vol. 7, #8, Nov. 1969, p. 457.
- Alfred Eich, "The Author Replies", TPT, Vol. 7, #8, Nov. 1969, p. 457.
- Alfred M.Eich, "Inertia Demonstration", TPT, Vol. 6, #9, Dec. 1968, p. 477.
- Thomas B. Greenslade, Jr., "Inertia Demonstration (photo)", AJP, Vol. 76, # 1, Jan. 2008, p. 72.
- M- 234: "Egg & Pie Pan-Nickels & Ruler", DICK and RAE Physics Demo Notebook.
- M- 230: "Pen and Embroidery Hoop", DICK and RAE Physics Demo Notebook.
- M- 226: "Coin-Card-Glass & Ball-Card", DICK and RAE Physics Demo Notebook.
- Charles Vivian, "The Inert Coins", Science Experiments & Amusements For Children, p. 90.
- Martin Gardner, "A Snap and a Drop", Science Tricks, p. 29.
- Martin Gardner, "Snap the Checker", Entertaining Science Experiments with Everyday Objects, p. 125.
- Vicki Cobb and Kathy Darling, "Stacked Odds", Bet You Can!, p. 82.
- Janice VanCleave, "79, Snap!", Teaching the Fun of Physics, p. 120.
- Janice VanCleave, "81, Penny Snap", Teaching the Fun of Physics, p. 122.
- Robert Ehrlich, "Shooting a Penny Out From Under a Stack of Pennies", Turning the World Inside Out, p. 21.
- Walpole, "The Lazy Coin", 175 Science Experiments, p. 102.
- Walpole, "Demolish the Tower", 175 Science Experiments, p. 103.
- Tik L. Liem, "Pull The Dollar Bill Out?", Invitations to Science Inquiry - Supplement to 1st and 2nd Ed. p. 132.
- Borislaw Bilash II, “The Magic Mallet“, A Demo A Day – A Year of Physical Science Demonstrations, p. 228.
- "Inertia Apparatus", Pike's Illustrated Catalogue of Scientific & Medical Instruments, 1984, p. 141.