2C20.44 - Coin in a Cup

Code Number:
Demo Title:
Coin in a Cup
Bernoulli's Principle
Area of Study:
Heat & Fluids
Penny, Styrofoam or Plastic Cup, and Small Block.

 Place the penny about 5 cm to 8 cm from the edge of a table.  Tilt the cup with the block, make the lower lip of the cup about 2 cm off of the table and about 8 cm behind the penny.  Blow hard across the top of the penny and it should lift up and jump into the cup.

  • Mateo Dutra, Alvaro Suarez, Martin Monteiro, Arturo Carlos Marti, "When the Quarter Jumps Into a Cup (And When It Does Not)", TPT, Vol. 60, #2, Feb. 2022, p. 87.
  • Martin Gardner, "44. The Hopping Ping - Pong Ball", Smart Science Tricks, p. 69.
  • Cy Tymoney, "Air Pressure Demonstration VI", Sneakiest Uses for Everyday Things, p. 26.
  • Robert J. Brown, "Bernoulli with a Dime", 333 More Science Tricks and Experiments, p. 49.
  • R. D. Edge, "Experiment 3.13: Levitating a Dime", String and Sticky Tape Experiments.
  • Robert Ehrlich, "H.12. Blowing a Quarter Into a Cup", Turning the World Inside Out and 174 Other Simple Physics Demonstrations, p. 106 - 107.
  • "Jumping Dime", Physics From the Junk Drawer, 3rd Edition, The Science House, North Carolina State University, p. 19.
  • Tik L. Liem, "The Leaping Egg", Invitations to Science Inquiry - Supplement to 1st and 2nd Ed. p. 30.

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