Planning and building The Door Stopper was a challenge. When I was testing it, the machine did not work the first time. It took many tries and changes to perfect it. The door stopper is a Rube Goldberg machine that will push a door stop into the door. There were many steps to building this, so how did I do it?
Some frustrating things that happened were not being able to find string, the walls I built would fall down, and other little things like that. But those aren’t the things that made me the most frustrated. . The revisions I made were when I realized that having the coca cola knock down dominoes would get rid of its force. One of my big insights was when I realized that my pulley would not work. Because of the marble being stopped while the pulley moved, the marble would not move. Another insight I had was when I realized that my wheel and axle could not reach the bottom of the track I had it on. Thus, it could not reach the marble. For this to work, the track’s floor would have to be raised higher.
Some of the resources I used were string, cardboard, marbles, boxes, cans, and the door stop. These materials helped build all of the parts of my Rube Goldberg machine. As I built the machine, I tested individual parts of it to know if it would work at least once. When I went to build the machine I could have a little more information about what parts might fail, or what parts are likely to ruin that run. Then, if different parts failed due to lack of force, I could know what to change.
In conclusion, my plan for The Door Stopper was not perfect and had many flaws. While building it, there were parts I identified that would not work/ did not have enough effort to move to the next step.
My sketch:
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