1. EF 151 Rube-GoldbergDevice

2. Team Porpoise Ryan Howell Nicholas Thacker Christopher Kmiec Benjamin Yeager

3. Purpose Swat those pesky flies via spring loaded fly swatter. Swat those pesky flies via spring loaded fly swatter. Demonstrate the conservation of energy Demonstrate the conservation of energy Developing team work Developing team work

4. Step 1 Marble rolls down PVC Marble rolls down PVC Losing PE and Gaining KE Losing PE and Gaining KE

5. Step 2 Small marble collides with large marble. Small marble collides with large marble. Conservation of Momentum Conservation of Momentum

6. Step 3 Large marble falls down funnel and collides with razor blade. Large marble falls down funnel and collides with razor blade. Transferring kinetic energy from marble to razor blade Transferring kinetic energy from marble to razor blade

7. Step 4 Blade cuts string Blade cuts string String releases spring String releases spring Spring potential energy transferred to fly swatter. Spring potential energy transferred to fly swatter.

8. Step 5 Fly swatter gains kinetic energy and squashes fly. Fly swatter gains kinetic energy and squashes fly.

9. CalculationsCalculationsCalculationsCalculations

10. CalculationsCalculationsCalculationsCalculations

11. Materials and Costs 10 pack razor blades $01.46 10 pack razor blades $01.46 Nail and band assortment $02.97 Nail and band assortment $02.97 PVC Pipe$01.92 PVC Pipe$01.92 Wood$01.00 Wood$01.00 Spring$00.25 Spring$00.25 Fly Swatter (3 pack)$00.99 Fly Swatter (3 pack)$00.99 Glue$03.37 Glue$03.37 Funnel$00.97 Funnel$00.97 Marbles$00.50 Marbles$00.50 Sticks of Wood$01.00 Sticks of Wood$01.00 Thread$00.25 Thread$00.25 Total$14.68 Total$14.68

12. Conclusions Device was successful. Device was successful. Conservation of energy was shown Conservation of energy was shown Fly vanquished Fly vanquished Gained problem solving skills Gained problem solving skills