Rube Goldberg Device Group 4 Jac Parks, Ben Fredericks Shane Nixon, Wesley Ward

Design Overview Design Considerations Design Concepts Encompassing course concepts while staying simplistic. 1 min set up time, 2 min run time Interfacing with Group 3 and 5 Design Concepts Translational Energy Conservation of energy and momentum Center of mass Torque Projectile motion

Operation Summary Marble 1 is set in motion by group 3 and traverses 2 inclined tracks Marble 1 moves down funnel triggering seesaw and motion of marble 2 Marble 2 accelerates down projectile ramp triggering mouse trap Mouse trap springs and releases banner Banner triggers group 5 device

Calculations Conservation of Energy- (Ball rolling)- 1/2mv2+mgh+1/2I2+Win=1/2mv2+mgh+1/2I2+Eloss Conservation of momentum-(Seesaw collision with Marble 2)- m1v1+m2v2=m1v’1+m2v’2 Torque-(motion of mousetrap pulling string)-IrI x IFIsin Center of mass-(seesaw)- mici / mi Projectile motion-(Marble 2 launched over gap)- x2=x1+voxt y2=y1+voyt+1/2at2

Design/Construction Issues Having to collaborate and fully understand the two other teams projects so that each project triggers the next. Making it easy enough to set up in 1 minute. Incorporating so many of the concepts we learned this year into one project that works seamlessly. Aligning everything to make sure the balls will fully complete their courses.

Conclusion This experiment was a fun, visual way to see everything we have learned in this class put into use. The Rube Goldberg experiment shows us how many concepts will have to be integrated together in order to engineer a working system.