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Bending a law of motion?

magnet car puzzle

I saw a perpetual motion Youtube video recently that tickled my curiosity.

Anna was intrigued as well, so we ordered some pinewood derby wheels and a box of magnets to see if we could understand this puzzle a little better.

We had fun tinkering with it for a few evenings before we came to the conclusion that the video is a trick that uses gravity instead of magnetism to move the car.



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Scientific inquiry at its finest. Thank you, Mark.

Comment by pedro Sun May 24 03:58:00 2015

The trick used is an old one. The table, background, camera and lights are all fixed with respect to each other and the stuff on the shelf is bonded down. The whole can be rotated or tilted.

Some famous examples of this can be seen in the film “2001: a space odyssey”. For instance people walking in the circular space station or centrifuge in the spaceship Discovery.

Comment by Roland_Smith Sun May 24 06:01:33 2015