Bed of Nails

Materials:

1. plywood

2. nails

3. hammer

4. ruler

5. pencil

Procedures:

1. Cut the plywood in a 10' by 10'.

2. Mark every 3/4 of an inch with your pencil and ruler and later mark every intersection with a dot.

3. Hammer the nails in every dot.

4. Test your balloon on a single nail and later on the bed of nails.

Results:

As you test the balloon on a single nail you see how it pops but once you test the balloon on the bed nails the balloon compresses as you add a book on top but it does not pop.

Conclusion:

Due to the pressure seperated in the weight of the object allows the object not to pop. In other words the balloons weight is distributed among a higher ammount of pressure in the bed of nails rather than when it was just one nail.

Physics Behind It:

preassure= force/area

The physics behind the bed of nails is that when you have a lot of nails on the bed, your weight will be distributed between all of the nails that the pressure excerted by each of the nails will not be dangerous because it will not be enough to break the person’s skin. You can even place a second bed on top of you and break a cinderblock on it. The resulting force is distributed over all of the nails, so you shouldn't be injured.

If you step on the point of a nail, your foot exerts a tremendous amount of pressure on the nail's tiny point.