Ball bridge

This is our balls bridge. we were given a starting amount of $12,000 and we used about $5,000 more materials. We used 2 cups, 6 inches of tape and 8 straws. We were able to use our remaining money to make a bridge that was so cash, it was made out of cash.

Bridge and Junk

Our (My) Bridge weighed about 11.5 grams which was able to hold 115 batteries which was about a 230:1 ratio.

This is my bridge across a 12 inch gap

This is my bridge slanting from the weight of the batteries

This is the bridge about to break from the weight of the batteries



After the repairs and redesign, the bridge weighed about 12.6 grams, and was able to hold 267 batteries which was a 490:1 ratio, meaning our bridge was the winner!

I don't have a picture of the redesign, but i added 2 toothpicks on both sides where the strings would be. 1 horizontally, and 1 vertically. These 4 toothpicks, and some reinforcements on the joints made it possible to hold 152 more batteries!

If i were to redesign it again, i would reinforce the joints on the end of the bridge to keep it from sagging on the end.

Blog Post for Robot

We have gone through many different designs for our robot, many of which were not very functional. Our final design is the best because it is able to turn, and go strait.




Our change in design from the 2 different challenges wasn't very dramatic. We just switched out the front wheel with a stationary lego piece so there was no resistance while turning.


Feedback

+ Our first design was able to swim

Change: It could only swim so we should've probably make it actually move

+ Our second design could move forward and turn with the same design

Change: no need

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