Allyson+Physics

__Physics Bridge__

Allyson Porath weight of bridge: 16.3 held: 6.9 efficiency: 192

Reflection: We started working on our bridge by researching already existing bridges and learned from their flaws. I used the same type of a design as a bridge in Europe; I don't remember what it was called, but it had mountains by it. I used about 8 sticks, and a tube and a quarter of glue, the triangles on the bottom is what made it strong. The only problem that caused my bridge to fail was the fact that it needed compression on either side to make it able to hold a lot of weight. I guess that is why it had mountains on either side of it. The bridge is 38 cms long and 5 cms wide. My bridge did not break, but it did bend in the middle: needed compression. The judge said that if I had just had two sticks across the bottom, it would have been really good. I did make the sides of my bridge to simulate a mountain, but it didn't work.