This roof can support over 400 times its own weight, and you don’t need tape! One of the great things about net forces is that although the objects can be under tremendous force, nothing moves! For every push, there’s an equal and opposite pull (or set of pulls) that cancel each other out.


This barrel roof is an excellent example of how to the forces all cancel out and the roof stands strong (hopefully!) If you have trouble with this experiment, just use cardstock or other heavy weight paper instead of regular copy paper.


Here’s what you need:
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  • Print out this template.
  • Scissors
  • 2 pencils
  • Thread
  • Flat book or light clipboard
  • Extra paper to load the roof

Watch the video:



 
Download Student Worksheet & Exercises


Exercises 


  1. What is Newton’s Third Law?
  2. What kind of groups do forces come in?
  3. What is another name for Newton’s Third Law?

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Comments

5 Responses to “Barrel Roof”

  1. juliebanister1 says:

    I LOVE PHYSICS. IT IS SO VERY INTERESTING AND COOI

  2. No, it is much better to use scissors. The risk of cutting yourself or your work surface is too high with a razor.

  3. Hey Mrs Lipper can you use a razor.

  4. It’s in the MATERIALS list above the vide.

  5. dina_blumkin says:

    Hi, where is the template for barrel roof?