Your Safer Source for Science
All-In-One Science Solution
Your Safer Source for Science
Address P.O. Box 219 Batavia, IL 60510
Phone 844-200-1455
Email [email protected]
Item #: AP6769 

Price: $85.58

In Stock.

With the Bed of Nails Pressure Demonstration Kit for physical science and physics, dramatically show that pressure is a force per unit area with this familiar demonstration.

See more product details

Product Details

Dramatically show that pressure is a force per unit area with this familiar demonstration. Place an inflated balloon on a wood block full of sharp nails. Add a 1000-g mass to the “floating” board on top of the balloon and amazingly the balloon does not pop! Continue adding more weight until the balloon pops. Repeat the demonstration using a single nail. Which bed of nails will support more weight before the balloon pops? The wood block with many nails holds significantly more weight without popping the balloon compared to the single-nail block. This effectively shows that as the surface area (number of nails) decreases, the pressure increases. Multi-holed board allows for a variety of nail quantities and combinations to show increasing or decreasing surface area.

Concepts: Pressure, force, surface area.
Time Required: 15 minutes
Materials Provided: Bed of nails, 50 balloons. 
Note: Replacement balloon are available. A weight set is required and available separately.


Materials Included in Kit: 
Aluminum nails, 2", 3 mm diameter, pkg/120
Balloons, 5", assorted colors, pkg/50
Wood base with two ⅝" dowel rods
Wood block with 99 holes, 4¾" x 3¾" x ¾"
Wood MDO with two ¾" holes, 9⅜" x 4⅝" x ¾"