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Nevada
Thursday, February 21, 2008
Magnitude - 6.0
First we made a cube for our base, then another cube on top of that, both with cross braces to support the structure.
One more cube on top of that and we had the height requirement. Later on we made a small platform for the egg to sit, then made a dome, to surround the egg.
Tension is the state of being stretched tight
Torsion is an action
that twists a material
Our plan was to make a structure out of spaghetti and marshmallows that could hold an egg during the shake table test, for at least 10 seconds.
Our building plan included making a big base, cross braces on each level, and a flat platform with a dome over it to hold the egg.
Stress is the force exerted when an object when an object presses on, pulls on, or pushes against another object.
A force that squeezes a material together
When you add pressure to
the top of the triangle, the
two sides squeeze together
and the bottom side pulls
apart.
When you add pressure to
the arch with external
supports, the external supports
push back both sides of the
arch to prevent it from spreading
apart.
Shear is a force that
causes parts of material to slide past one another in opposite directions
When you add pressure
to the square with the cross
brace going in a diagonal
direction , the cross brace
prevents the square from
toppling over.