Group 4 Chris Clemmer Meredith Niethammer Sean Bradshaw Spencer Dogget Rube Goldberg Device December 1, 2009 Group 4 Chris Clemmer Meredith Niethammer Sean Bradshaw Spencer Dogget 1/18/2019

Introduction Our goal in this team project was to create a Rube Goldberg device to accomplish the task of presenting a banner of some kind. Our group decided to go about doing this by setting up pegboards and using a marble rolling down multiple tracks to collide with a lever. Then the lever in turn pulled on a string, releasing another marble down a separate track. This second marble is then launched off a slight ramp and caught in a funnel that drops it directly onto a mouse trap. The trap springs shut and triggers a scroll to be unrolled displaying the banner. 1/18/2019

Supplies Peg Board ($3) Hot Wheels Track ($2) Dowel Rods ($2) Funnel ($1) Marbles ($4) Duct Tape ($1.50) Bottle ($1) String ($1) Scrap Wood (not worth anything) Mouse Trap ($4) Paper Towel Roll ($1) Total: $19.50 1/18/2019

Rube Goldberg Device Gravitational Potential Energy Conservation of Momentum Stage 3 Stage 2 Stage 1 Center of Masses Conservation of Linear and Angular Momentum 1/18/2019

Rube Goldberg Device Stage 5 Gravitational Potential Energy Projectile Motion Torque And Spring Motion Stage 4 Stage 6 1/18/2019

Calculations For Step One: (Gravitational Potential Energy) mgh = .5mv^2 + .5Iw^2 mgh = .5mv^2 + .5((2/5)mr^2)(V/r)^2 gh = .5mv^2 + (1/5)v^2 v = 40.7 in/sec or 3.4 m/sec For Step Three: (Potential) h = 1.20833 ft v = 7.45 ft/sec For Step Four: (Trajectory) Theta= 21 y-y1 = tan(theta) (x-x0) – ((g)/(2v0^2))(1+tan(theta)^2)(x-x0)^2 0 = tan(21) * x x = 11.16 in 1/18/2019

Conclusion Our device worked, even if we failed in the beginning when creating the first designs of our project. Eventually, we worked through our initial problems and succeeded in displaying the banner. The design we chose was very simple and wasn’t hard to alter if we ran into minor setbacks along the way. The only aspects we might want to change would be the way we thought up ideas, we should have considered more in depth the problems we might run into and spend more time anticipating what might occur that would slow down our progress. Overall I believed we functioned well as a group to achieve our goal but like our Rube Goldberg, a lot of energy was wasted. 1/18/2019