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How a chair of nails works - Fizzics Education

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How do nail chairs work?

How do nail chairs work?

Follow FizzicsEd 150 Science Experiments:

You will need:

NOTHING! Do not try to replicate this.

1 Chair of nails

What the video and learn how the chair of nails works. DO NOT TRY THIS AT HOME.

2 A man pointing at a bicycle wheel spinning horizontally on a desk (balancing by itself)

Get the Unit of Work on Forces here!

  • Push, pull
  • Friction & spin!

From inertia to centripetal force, this unit covers many concepts about Newton’s Laws!

Includes cross-curricular teaching ideas, student quizzes, a sample marking rubric, scope & sequences & more

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3 Adding dry ice to a large column of bubbly water
4 Teacher showing how to do an experiment outside to a group of kids.

Online courses for teachers & parents

– Help students learn how science really works

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Why Does This Happen

A bed of nails works on pressure.
Weight is evenly spread out across many nails, thereby reducing the chance of nails puncturing the skin.
If you sat on just one nail (or a few), most of your mass would be concentrated on less surface area and the leverage of the sharp points would make the nails pierce your skin.

Moral of the story; it’s a science experiment disguised as a “magic” trick… however, those nails are still sharp and if it is set up incorrectly you could hurt yourself or others so this experiment should not be replicated.

A man with a glove above a liquid nitrogen vapour cloud

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