EF 151 Roller Coaster Project Team: Go Vols Josh Ferguson Erick Foster John Collins John Hungerford

Preliminary Design Simple design so it would be easy to build Long coil to eat up time Small ramp at the end Funnel to catch the rolling ball Tail at the end of the funnel to eat up more time

Problems Encountered Support for tubing Tube kinking up and squishing closed Tube bending and swaying Particles and PVC pipe debris getting in tube Too short of a run

Final Design

Materials PVC pipe Clear plastic tubing Wire hangers Scrap wood Nails and screws Soda can Metal bearing Hot glue Lots and Lots of Duct Tape!!!!

Calculations By using the Conservation of Energy equation, we were able to calculate the ball’s theoretical speed at the bottom of the ramp. ----------------------------13.3 ft./sec.--------------------------- By using the trajectory equation and a few experimental runs, we were able to determine the actual velocity. ----------------------------5.58 ft./sec.--------------------------- Finally, by using the Conservation of Energy equation again, we could determine the energy lost during the run. ----------------------------.0301 ft.-lbs.--------------------------

Conclusion Our design seemed simple enough, however, when actually building the coaster, we ran into many problems and delays. The actual building process took much longer than expected because of these problems; we spent approximately 12 hours. This project was kind of fun, and it allowed our group to use the lessons learned in EF 151 in real life physical applications.