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Author Topic: Shifted Levers  (Read 2930 times)
Jr. Member

Posts: 87
Shifted Levers video: https://www.youtube.com/watch?v=8TniRMwL2Vg
The combination of two triple levers (black) with one shifted lower, creates a significant overbalancing effect on the left. The model was built to illustrate the original idea that is taken from: https://www.youtube.com/watch?v=srBbJSzaqOg

Group: Elite
Hero Member

Posts: 1793
It just looks overbalanced.

The weight of each bar/flag is applied equally to the arm it is attached to.

Since each bar/flag weighs the same (assumed) the same weight is applied at all three points.

One could argue that the increased distance from the mechanism center to an extended flag creates a higher leverage on the whole mechanism but it doesn't. The effect of higher leverage is defeated by the combined joints.

"As far as the laws of mathematics refer to reality, they are not certain; as far as they are certain, they do not refer to reality." - Einstein

"What we observe is not nature itself, but nature exposed to our method of questioning." - Werner Heisenberg

Group: Experimentalist
Hero Member

Posts: 2187
It is a clever optical illusion. The real center of rotation of the "flags" is not where you think it is ;) How many flags are going uphill to going down hill? it can't work, there is no gain in weight on one side, only a loss O0

Run the vid in slow motion and look at the flags only.

The motion is run by an external means, not the flags.


Mike 8)

"All truth passes through three stages. First, it is ridiculed, second it is violently opposed, and third, it is accepted as self-evident."
Arthur Schopenhauer, Philosopher, 1788-1860

As a general rule, the most successful person in life is the person that has the best information.
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