My teams rube demonstrated the use of pulleys, complex levers, and many inclined planes. A pulley was used in Chris’s step to trigger the final tennis ball and levers were used in the first step, Amelia's step with the tether ball, Cormac’s step with the dominoes, and the rat trap in Daniel’s step. Inclined planes were scattered throughout the Rube to maximize the use of potential energy. If I were to start the Rube by dropping a 7 gram steel ball, the potential energy is .034335 Joules. This is how much energy it has being still at the top of the 50 cm mark. The kinetic energy is .000708755 Joules. This is how much energy it has while in motion falling from the 50 cm mark to start the Rube. When building our Rube, we all mostly stuck with our first ideas. We built all the steps separately and then improvised to make them fit together in a working machine. The skill I used most in this project was critical thinking. When presented with last minute issues, I was able to solve problems with creative hot glue gun saves and innovative builds that improved long term functionality.