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Cost Calculations:
Reflection:
I learned that the right 'mix' of equal compression and tension can help an engineer design the best and most stable bridge. I found that sometimes the least amount of materials could sometimes be the best way of building a decent bridge. I would try to experiment more with trying to use less material so that the cost of the bidge is as much. I would also use thicker material instead of more pieces of material.
Conclusion Questions:
How does this type and direction of stress applied affect the selection of the material type and the cross-sectional area?
You would always want to use the strongest material and the thickest piece but that wouldn't have as big of an affect on the bridge's strength if those pieces aren't positioned correctly based off the stress on it and that stress' direction. They are affected by both of those aspects.
How can the forces of compression and tension work together to make a stronger bridge?
As long as the different forces cancel out because they have equal forces in opposite directions, the bridge will be stronger aand the forces would not be pulling the bridge down so that it breaks.
You would always want to use the strongest material and the thickest piece but that wouldn't have as big of an affect on the bridge's strength if those pieces aren't positioned correctly based off the stress on it and that stress' direction. They are affected by both of those aspects.
How can the forces of compression and tension work together to make a stronger bridge?
As long as the different forces cancel out because they have equal forces in opposite directions, the bridge will be stronger aand the forces would not be pulling the bridge down so that it breaks.