My Test:

For the three I get to chose I will be using my work on:
1.  the balloon racer-look below
2.  the magnet car-look below
3.  the balloon into space-I know ours didn't really work but I am more using how we made the check list and helped organize things; also doing other strange things for other groups like coping things.  There are many posts below this one that explains our ideas and what ended up happening!

Magnet Car

Sara and I worked together on the magnet car and it is working really well.  It is two long lego pieces with a one of those black long straight pieces as the axis.  We have two small wheels on the back so they don't wiegh the back down and we have two big wheels on the front to keep all the acceleration going.  Our car is very easily rolled which is good.  For our magnet we took a U shaped one and duck taped it to the top.  We then took a ruler and put two U shaped magnets on the end of it that make the other one repel.  This works really well.  Our first time we got a minute and 18 seconds but we cut it down to just 33 seconds.  Also one time we just went one way and it was only 13 seconds.  One problem with this is that some of the time the magnets get messed up and connect which does cause some issues but hopefully all will be ok!

Balloon Car Extra:

Basic Facts:
mass=20 grams
acceleration=0.0716
net force=1.432

Our Car:
Sara, Elizabeth, and I worked on this car together.  Basically all our car was was a piece of cardboard and bottle caps as the wheels.  Then we had a pipe connected to the two balloons so that we could blow it up easier and so when the air came out all of the air just came out of the pipe.  This idea worked really well.  What helped our car do so well is because it was very light weight but enough mass to let it be able to continue rolling.

For more information look at Sara's (she also has a video I believe)
http://www.facebook.com/notes.php?id=100000403791912#!/note.php?note_id=175786519131536