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A More Creative Way of Squeezing Your Toothpaste

A More Creative Way of Squeezing Your Toothpaste. By: Lester Foo Shi En 3P3 10 Jonathan Phua Jia Sheng 3P3 08. Check out the Video. Materials Used. Materials Used. Notepad. Materials Used. Books. Materials Used. Bottle with eraser attached. Materials Used. Cotton Twine & Thread.

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A More Creative Way of Squeezing Your Toothpaste

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  1. A More Creative Way of Squeezing Your Toothpaste By: Lester Foo Shi En 3P3 10 Jonathan PhuaJia Sheng 3P3 08

  2. Check out the Video

  3. Materials Used

  4. Materials Used Notepad

  5. Materials Used Books

  6. Materials Used Bottle with eraser attached

  7. Materials Used Cotton Twine & Thread

  8. Materials Used Bottle with Cotton Twine

  9. Materials Used Bottles filled with water

  10. Materials Used Ball with thread

  11. Materials Used Marker, Tape, Scissors

  12. Materials Used Card Boxes

  13. Materials Used Toy Car

  14. Materials Used Toothpaste

  15. Materials Used Toothbrush

  16. Materials Used Line Tracking Robot

  17. Materials Used Track (for robot)

  18. Materials Used Keyboard

  19. Materials Used Chairs

  20. Materials Used Ramp

  21. Materials Used Spray Can

  22. Materials Used Soccer Ball

  23. Materials Used ‘Hamburger’

  24. Energy Conversions

  25. 1st Station • GPE 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

  26. 2nd Station • Having 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

  27. 3rd Station • As the 1st book topples, it creates a domino effect and it continues throughout

  28. 4th Station • As 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).

  29. 4th Station • As there is tension in the string, the bottle topples over, releasing the string attached to the ball which it is sitting on

  30. 5th Station • The ball is released after the bottle toppled and it hits the ‘play’ button on the keyboard, starting the song ‘London Bridge’

  31. 5th Station • As the ball still has KE, it travels down the keys and hit the book, once again the domino effect is triggered

  32. 6th Station • When the blue book topples, the KE is being transferred to the green toy car, causing it to move down the ramp

  33. 7th 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 robot There’s a string attached from the bottle to an eraser which is in front of the robot’s wheel

  34. 8th 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]

  35. 9th Station • When the cotton twine is released, the bottle drops onto the toothpaste, thus squeezing it

  36. Mistakes & Challenges

  37. Mistakes • The 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 effect

  38. Mistakes • The 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

  39. Challenges • External 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 preparations

  40. Challenges • We 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 lacked

  41. The End

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