Eighth+Period+Rube+Goldberg+Project

Eighth Period Rube Goldberg Project

Group 1: Sarah, Drew, Laura, Logan

Our Rube Goldberg experiment is really quite simple. Our goal was to get three Mentos® into a bottle of Diet Coke®.

Our set-up begins with a tube that is taped to a long stand. The end of the tube is propped up by another tube to ensure that it is stable. Drew takes a wooden ball to roll down the tube. The ball then hits a train on a track, pushing the train. The train then hits dominos. The dominos fall and once the last domino is hit, it falls into a cup. The cup is part of a pseudo-pulley system. The cup that is being outweighed by the cup with the domino has a string taped to it. The string has a strategically placed piece of paper attached to it that is being used as the barrier between the Mentos® and the Diet Coke®. That piece of paper is wedged into a small slit made in the homemade tube circling the opening of the bottle. When the domino falls into the first cup, the other cup is outweighed, sending it flying into the air, pulling the piece of paper out of the cut slit. The Mentos® then fall into the Diet Coke®, creating a magical eruption.

Ball rolling down tube: Kinetic Ball hits train: Kinetic Train hits dominos: Kinetic Dominos fall: Kinetic Domino in cup: Potential Cup system flies: Kinetic Piece of paper comes out of slit: kinetic Mentos fall: Kinetic

==**Video: File is too large to upload. Trying to link to the file. hmmmm....will have to work at it.** ==

Group 2: Claudia, Erica, Mikala, Takara

The Description
Video of Working Fish Feeder:
 * Actions || Energy Change ||
 * A. Thumb pushes button || Mechanical Energy ||
 * B. Pluto walks || Electrical Energy ||
 * C. Pluto kicks car causing car to roll || Kinetic/Potential Energy ||
 * D. Car hits tube || Kinetic Energy ||
 * E. Tube hits ball || Potential Energy ||
 * F. Ball hits dominoes || Kinetic Energy ||
 * G. Domino falls onto lid || Potential Energy ||
 * H. Fish food falls off lid into bowl || Potential Energy ||

Group 3: AJ, Anna, Maddie, and Merideth

**Diagram**


Anna shoots the ball with her Nerf gun, the ball falls and hits the Newton ’s cradle, and the Newton ’s cradle hits the other ball. That ball hits the dominos. Then the dominos knock the eraser over. The eraser knocks the Mentos off of the table and into the Diet Coke bottle, making the Diet Coke EXPLODE!


 * Video: [[file:VID02049.AVI]]** The mento caught in the "funnel" and didn't fall all the way through until after the video camera was stopped.

See the result when it fell through.

Group 4: Kristen, Brandi, Kirsten, Nancy



The Explanation: Energy Conversion Before the machine is running, all objects have potential energy because they have the ability to move, but are at rest. Therefore, kinetic energy has to be applied from a person to the pencil that hits the ball. While the bouncy ball is on the top of the ramp it has low kinetic energy, but high potential energy because it is at a high point. The bouncy ball rolls down and therefore its kinetic energy increases as it rolls down and hits the wooden ball which then rolls down increasing its kinetic energy and hits the books. The books energy is converted from potential energy to kinetic energy, and knocks down the dominoes. Once the dominoes have no more kinetic energy because they have stopped moving they move the car forward down a tube and onto the stool. On the stool, this fish food has potential energy, but then will be moved by the car and the food will fall into the fish bowl.

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Group 5: De'Janai, Krystal, Kelsey, and Tia

Energy Changes: The ball has potential energy while sitting on the ramp. It has kinetic energy when the finger pushes it. The car has potential energy while sitting on the ramp. It has kinetic energy when the ball hits it. The dominoes have potential energy while sitting on the box. They have kinetic energy when the cars hit the dominoes and the dominoes hit eachother. The cups have potential energy while hanging from the thumbtack. They have potential energy when the domino falls into one of them and they move. The ramp has potential energy while being still. It has kinetic energy when the cup hits it and pushes it up. The marble has potential energy while sitting on the ramp. It has potential energy when the ramp moves up and it startes rolling. The Mentos has potential energy while sitting on the spiral. It has kinetic energy when the marble hits it and it falls into the bottle.

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