A More Creative Way of Squeezing Your Toothpaste

A More Creative Way of Squeezing Your ToothpasteBy: Lester Foo Shi En 3P3 10Jonathan Phua Jia Sheng 3P3 081Check out the Video

Materials UsedMaterials Used

NotepadMaterials Used

BooksMaterials Used

Bottle with eraser attachedMaterials Used

Cotton Twine & ThreadMaterials Used

Bottle with Cotton TwineMaterials Used

Bottles filled with waterMaterials Used

Ball with threadMaterials Used

Marker, Tape, ScissorsMaterials Used

Card BoxesMaterials Used

Toy CarMaterials Used

ToothpasteMaterials Used

ToothbrushMaterials Used

Line Tracking RobotMaterials Used

Track (for robot)Materials Used

KeyboardMaterials Used

ChairsMaterials Used

RampMaterials Used

Spray CanMaterials Used

Soccer BallMaterials Used

HamburgerEnergy Conversions1st StationGPE of the hamburger is converted into KE as it travels down the ramp

When the hamburger hits the ramp, the KE is transferred to the soccer ball, giving it KE

2nd StationHaving KE, the soccer ball drops off the table and continue moving, hitting the book

KE is transferred from the soccer ball to the book, causing the book to topple

3rd Station

As the 1st book topples, it creates a domino effect and it continues throughout

4th StationAs the KE is being transferred to the small blue book, it topples and lands onto a string (attached to the bottle and the end of the chair).

4th StationAs there is tension in the string, the bottle topples over, releasing the string attached to the ball which it is sitting on

5th Station

The ball is released after the bottle toppled and it hits the play button on the keyboard, starting the song London Bridge

5th Station

As the ball still has KE, it travels down the keys and hit the book, once again the domino effect is triggered6th Station

When the blue book topples, the KE is being transferred to the green toy car, causing it to move down the ramp7th Station

As there is tension in the string, the eraser is being pulled away from the wheel when the car hits the string, freeing the robotTheres a string attached from the bottle to an eraser which is in front of the robots wheel8th Station

The robot travels on the track and finally hits the book, which topples onto the bottle, releasing the cotton twine, which is attached to another bottle[not shown]9th Station

When the cotton twine is released, the bottle drops onto the toothpaste, thus squeezing itMistakes & ChallengesMistakesThe soccer ball went out of track and failed to start the domino effect

The gaps between the books were too far and some failed to continue the domino effectMistakesThe tension in the string tied to the water bottle was too small, allowing the book to land onto the string without triggering any other movements

The ball was not directly above the play button of the keyboard and no music was played even after the ball was released

ChallengesExternal forces like wind exerted a force on part of the domino chain and messed up our Rube Goldberg machine

Carelessness in our movements caused mess-ups in our preparationsChallengesWe did not manage to build our machine according to our original design due to miscalculations and misjudgments

We had to make use of common household objects to substitute those that we lackedThe End