1F20.25 - Bed of Nails - Smash a Block

Code Number:
Demo Title:
Bed of Nails - Smash a Block
Pressure vs. Surface Area
Area of Study:
Large and Small Beds of Nails, Protective Shield, Safety Mask, and Sledge Hammer.

Place one of the large bed of nails on the floor and have someone lay on it.  Provide a protective pillow for the head.  Cover the face with the protective Plexiglas plate and then place a cement block on the chest of the volunteer "victim".  Break the block with a sledge hammer.

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  • Huang Guo-xiong, "Unbroken Eggs", TPT, Vol. 34, #5, May 1996, p. 311.
  • .H.T. Hudson, "The Most Obvious Explanation Is Not Always Correct", TPT, Vol. 26, #1, Jan. 1988, p. 34.
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  • "Strength", Guinness World Records 2003, "Greatest Weight Broken On Chest While Lying On Bed Of Nails", p. 38.
  • David Kutliroff, "35. Fakir Physics", 101 Classroom Demonstrations and Experiments For Teaching Physics, p. 80.
  • Jearl Walker, "1.56. Beds of Nails", The Flying Circus of Physics Ed. 2, p. 27.
  • "F-035. Seat and Bed of Nails", DICK and RAE Physics Demo Notebook, 1993.
  • G. D. Freier and F. J. Anderson, "Ml-2", A Demonstration Handbook for Physics.

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