EF 151 Final ProjectEF 151 Final Project

Rube-Goldberg deviceRube-Goldberg device

Our TeamOur Team

Mitch GroothuisMitch Groothuis Kelly BradshawKelly Bradshaw Ryan HopsonRyan Hopson James BurrellJames Burrell

Mini Cooper LauncherMini Cooper Launcher

Device PurposeDevice Purpose

This device will launch a Mini Cooper This device will launch a Mini Cooper Hot Wheels car at a high velocity.Hot Wheels car at a high velocity.

The Mini can be launched into any The Mini can be launched into any object.object.

Can be used as a mini wrecking ball.Can be used as a mini wrecking ball.

Step OneStep One

Weight fallsWeight falls Pulleys and Pulleys and

string raise string raise the elevatorthe elevator

Marble dumps Marble dumps from elevator from elevator into funnelinto funnel

Step TwoStep Two

Small Marble rolls Small Marble rolls through pipethrough pipe

Small Marble Small Marble collides with Large collides with Large Marble and falls Marble and falls down reload pipedown reload pipe

Large Marble Large Marble collides with collides with Bouncy BallBouncy Ball

Step ThreeStep Three

Bouncy Ball Bouncy Ball falls through falls through pipepipe

Ball collides Ball collides with scissorswith scissors

Step FourStep Four

Scissors cut Scissors cut stringstring

Springs Springs launch Mini launch Mini up the ramp up the ramp and into the and into the airair

Energy ConversionsEnergy Conversions

Step One – GPE of the Weight raises Step One – GPE of the Weight raises the marble elevator and is the marble elevator and is transferred into GPE of the Small transferred into GPE of the Small MarbleMarble

Step Two – GPE of the Small Marble Step Two – GPE of the Small Marble is transferred into KE as it rolls, is transferred into KE as it rolls, collision transfers into KE of the collision transfers into KE of the Large Marble, which transfers into KE Large Marble, which transfers into KE of the Bouncy Ballof the Bouncy Ball

Energy Conversions (cont.)Energy Conversions (cont.)

Step Three – KE of Bouncy Ball Step Three – KE of Bouncy Ball increases with GPE as it falls through increases with GPE as it falls through pipepipe

Step Four - KE of Bouncy Ball closes Step Four - KE of Bouncy Ball closes the scissors on the string to release the scissors on the string to release EPE that is stored in the springs of EPE that is stored in the springs of the launcher. KE of the launching the launcher. KE of the launching block is transferred into KE of the block is transferred into KE of the Mini.Mini.

ConclusionsConclusions

Input – GPE of Weight = 2.83 JoulesInput – GPE of Weight = 2.83 Joules Output - KE of Car = 0.197 JoulesOutput - KE of Car = 0.197 Joules Estimated Launch Speed = 3.1 m/sEstimated Launch Speed = 3.1 m/s