1K30.10: Bed of Nails

PURPOSE: To demonstrate the relationship between area, force, and pressure.

DESCRIPTION: 24"x48"x3/4" plywood with 16d nails spaced 1/2"apart. Nails are sharp! Bed is heavy

SUGGESTIONS: Lay bed flat on floor, stand astraddle the lower part of the bed, squat so that you can support weight with arms on either side of the bed and slowly lower yourself to sitting position on bed. With arms supprting weight, slowly lower upper body to reclining position. To dismount - sit up on bed with arms and legs spread to each side of bed. Use arms to rise until you can balance on legs.

EQUIPMENT: Bed of Nails, Nerves of Steel.

SETUP TIME: None.


Go back to Lecture-Demonstration Home Page.