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
- What is Newton’s Third Law?
- What kind of groups do forces come in?
- What is another name for Newton’s Third Law?
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The “circular” shape should form naturally as you make the folds. Were you able to print out the folding template?
No matter what we do, we can’t get to that shape to pull out the Barrel roof. How are you making that “circle”?
Thank you.