Clint DeLozierClint DeLozier

Paul NogradiPaul Nogradi

Eliott CooperEliott Cooper

Cari WorleyCari Worley

1. Object initiates Rube Goldberg device by striking the red plunger to release the steel pipe. The pipe then transfers energy into the dominoes.

2. Dominoes fall, with the end domino falling onto the spoon attached to the Spoon Wheel.

3. The Spoon Wheel then unbalances the Teeter-Totter allowing the steel ball to navigate a crevice.

4. The steel ball falls off of the Teeter-Totter and onto a PVC housed plunger, activating our electronic device or a mouse trap attached to the next Rube Goldberg device.

Ball .028 kg | Domino .02 kg | Pipe .055 kg |

Conservation of Rotational Energy1. Ipipe = mr2 + md2 = (.055 kg)(.012 m) 2 + (.055 kg)(.0445) 2 = 0.000117 kg-m 2

2. Pipe | MGH = ½ Iω2 | (.055 kg)(9.81 m/s2)(0.0445 m) = (1/2)(0.000117 kg-m 2) ω2 | ω = 20.3 rad/sec

3. ½ I ω2 = (1/2)(0.000117 kg-m 2) (20.3)2 = 0.024 J

Torque - Dominoes to Wheel4. τwheel = F R Sin θ = M G R Sin θ = (.02 kg)(9.81 m/s2)(.15 m) Sin π/2 = 0.03 N-m

Center of Mass - Teeter-Totter5. CMTeeter = x =[(.0684 kg)(.13335 m)+(.028 kg)(.1175 m)]/( .0684 kg + .028 kg) = 0.129 m (due to friction)

Conservation of Translational Energy - Ball to Plunger6. MGH = ½ MV 2 | (.028 kg)(9.81 m/s2)(.229 m) = (1/2)(.028)V 2 | V = 2.12 m/s

7. ½ MV 2 = (1/2)(.028 kg)(2.12) 2 = 0.063 J

Being triggered and triggering the next device (ease, heights, ball missing the end plunger).

Keeping the Teeter-Totter from over/under rotating.

Making the Spoon Wheel as frictionless as possible.

Particle board is NOT the best wood!

• In the end, we realized the hardest part of the project was the presentation.

• The construction wasn’t as difficult of a process as we anticipated and we had fun while working on it.

• Design and construction are easiest when working on each element together, not individually.

• Simplicity and consistency are key elements in this complex process.