What is your score on efficiency? If the efficiency is high/low, what went right/wrong?
Our efficiency score is 349. Though it is higher than average, we were expecting much more from our design. This is probably due to the bridge being too long for the 50 cm gap at the testing area, thus leaving the bridge to rest on its slopes instead of the base. This affected the slopes such that it snapped on one side, but still leaving the rest of the bridge intact.
Which part of the bridge started to give way first? Explain using Physics or Engineering Concepts.
The right slope of the bridge. The gap of the testing area was too long for the bridge to rest on the base, thus leaving the slopes to rest on the platforms as shown.
As the mass of the load hits 65 kg, the base, under the stress of the load, collapsed through the slope which was pushing back against the base since it rested on the platform.
The sudden force of the base collapsing through the slope and onto the platform led to the breakage 3/4 down the base to the middle as shown. This cause the whole bridge to follow up and collapse.
Which part of the bridge provided the most strength in the testing process? Explain using Physics or Engineering concepts.
The two supports in the middle of the bridge provided the most strength. They play a huge role as the load is focused on the middle of the base. The two supports supported the middle such that the weight does not easily collapse through it, thus, helping distribute the weight strongly and evenly between both sides of the bridge and prevented the load from crashing through easily.