I had to make a Rube Goldburg machine for my Principles of engineering class. here are the steps: 1-Ball rolls down track 2-Ball fals into pully 3-Pully raises arm and relases toy car 4-Toy car rools down inclined plane and hits lever 5-Lever rises and marble rolls down and off onto track 6-Marblerools to end of track and stops. Simple, but meets all the nessesary requirements. (smiley face out of equals sign and Bracket)
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