Deadly Pez DispenserDeadly Pez Dispenser

Team MembersTeam Members Quincy BeasleyQuincy Beasley London WebbLondon Webb Joel FugateJoel Fugate Michael BettisMichael Bettis

PurposePurpose The purpose of project is to rapidly The purpose of project is to rapidly

dispense candy. Conservation of dispense candy. Conservation of energy is used to make 2 ping pong energy is used to make 2 ping pong balls hit a mouse trap that will balls hit a mouse trap that will release candy.release candy.

DemonstrationDemonstration

Energy ConversionsEnergy Conversions Summary of Energy ConversionsSummary of Energy Conversions Step 1 : Ping pong ball rolls down first pvc pipeStep 1 : Ping pong ball rolls down first pvc pipe Height above ground to center of pvc pipe – 17.5 inchesHeight above ground to center of pvc pipe – 17.5 inches Distance till impact with second ping pong ball – 2.5 inchesDistance till impact with second ping pong ball – 2.5 inches Gravitational potential energy Gravitational potential energy Kinetic energy Kinetic energy mgh = .5mv^2 + mgh mgh = .5mv^2 + mgh (386.4 inches/sec^2)(17.5 inches) = .5v^2 + (386.4 inches/sec^2)(15 inches) (386.4 inches/sec^2)(17.5 inches) = .5v^2 + (386.4 inches/sec^2)(15 inches) (masses cancel) (masses cancel) V= 43.95 inches/sec (3.66 ft/sec)V= 43.95 inches/sec (3.66 ft/sec) Step 2 : Ping pong ball hits other ping pong ballStep 2 : Ping pong ball hits other ping pong ball Mv1 + mv2 = mv1’ + mv2’Mv1 + mv2 = mv1’ + mv2’ 43.95 inches/sec + 0 = 0 + v2’43.95 inches/sec + 0 = 0 + v2’ 43.95 inches/sec = v2’ (masses cancel)43.95 inches/sec = v2’ (masses cancel) Step 3 : Ping pong ball hits mouse trapStep 3 : Ping pong ball hits mouse trap Height of mouse trap - .75 inchesHeight of mouse trap - .75 inches Initial Kinectic energy + Gravitational potential energy Initial Kinectic energy + Gravitational potential energy Kinetic energy Kinetic energy .5mv^2 + mgh = .5mv^2 + mgh.5mv^2 + mgh = .5mv^2 + mgh .5(43.95 inches/sec) ^2 + (386.4 inches/sec^2)(15 inches) = .5v^2 + .5(43.95 inches/sec) ^2 + (386.4 inches/sec^2)(15 inches) = .5v^2 + (386.4 inches/sec^2)(.75 inches)(386.4 inches/sec^2)(.75 inches) V= 113.77 inches/sec (9.48 ft/sec)V= 113.77 inches/sec (9.48 ft/sec)