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Introduction

Results

The testing process went smoothly, and all the equipment used behaved in an expected way. The block was able to traverse the entire length of the bridge deck without running into any obstructions. The testing process went smoothly, and all the equipment used behaved in an expected way. The bridge met the weight requirements as it weighed in at 82g which is below the max of 85g This test went as planned and in all four trials the bridge was able to lift enough from the 10g force for the piece of 20lb stock paper to slide underneath. It was found that the bridge met all the requirements tested for in this section, however this demonstrates there is room for improvement in the bridge design. Since the bridge was both underweight and over length, a design change could have been made to increase the bridge's strength by making it both shorter and heavier.  The results of this test demonstrated that the bridge was able to maintain most of its rigidity up until the point of fracture. The maximum deflection before fracture was 3mm, an acceptable amount for the bridge project.  The testing process encountered some problems along the way, but the test was completed overall. The first problem encountered was attaching the scale to the eyehook. In the first attempt a key ring was used. The key ring was successful for the first half of the test, but it broke in the second half. A carabiner was used to replace the broken key ring and remained successful for the remainder of the test. The goal for this test was for the bridge to support a weight of 20kg. The bridge ended up braking at just under 18kg, so the goal was not reached. After inspecting the bridge, it was determined that the reason for failure was due to the method of fastening the bridge pieces together. The bridge separated at the joints; the actual bridge members showed no sign of breaking

Results
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