Project requirements:

Remember, the goal is NOT to see how much weight your shape can support. It is the RATIO of the weight (mass x gravity) of the books to the weight (mass x gravity) of your tetrahedron.

Step #1) Please DRAW an engineering diagram showing how you plan to construct your tetrahedron. Remember, the main supports MUST be 7.0 cm in length and MUST be in the shape of tetrahedron.

1. Please include your name, period and date.
2. Please also include a scale for your design
3. Turn this in as page 1 of your packed

Step #2) Measure the MASS of your tetrahedron (in grams)

Step #3) Find the total MASS of books your tetrahedron can support BEFORE it fails.

Step #4) Make a second engineering diagram on the same page as the first diagram

Step #5) Build a version 2 of your tetrahedron

Step #6) Find the total MASS of books your 2nd tetrahedron can support BEFORE it fails.

Step #7) Work with the project marshall to stack your books an the class recorder person to make sure to accurately record the mass of your tetrahedron and the mass of books supported (before it crumples) in our data form HERE

Record the following information on a data sheet in your packet as page 2

1. The mass of your tetrahedron in grams
2. The weight of your tetrahedron in N (calculated for you on the data form)
3. The mass of books it supported in grams
4. The weight of those books in N (calculated for you on the data form)
5. The strength to weight ratio (calculated for you on the data form)
6. Turn this in as page 2 of your packed

Step #8)

Write a final report that compares your first tetrahedron to your second:

• Which performed better (had a higher strength to weight ratio)
• Why did that design work best?
• Be sure to write in full and complete sentences
• Turn this in as page 3 of your packet

DATA PAGE/RESULTS: HERE

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HOLD OFF ON THESE FOR NOW

Tissueing instructions are HERE

Submit Writeup on our classroom form HERE