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Force multiplier
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electrodacus:

--- Quote from: fourfathom on February 08, 2023, 02:10:28 am ---No, the problem is that you won't understand a simple and complete geometric example.  And as has been demonstrated many times here, there is no need (or even place) for your "slip-stick hysteresis energy storage".

--- End quote ---

Prove that with either correct physics equations or a video of a real world example.
I proved what I claim with video of the real world example.
In case you have not seen watch the first 15 seconds of this video https://odysee.com/@dacustemp:8/stick-slip-removed-from-front-wheels:0
It shows the vehicle in diagram (a) being dragged in the direction of applied force showing that the mechanism is indeed a locked gear so enough force needs to be applied in order to slip in the same direction.
At constant speed so not the acceleration part F2 = F1 during acceleration F2 = F1 + m*a

If you think I did something to fake this test you can do the same and prove that I'm wrong.
fourfathom:

--- Quote from: electrodacus on February 08, 2023, 02:20:48 am ---
--- Quote from: fourfathom on February 08, 2023, 02:10:28 am ---No, the problem is that you won't understand a simple and complete geometric example.  And as has been demonstrated many times here, there is no need (or even place) for your "slip-stick hysteresis energy storage".

--- End quote ---

Prove that with either correct physics equations or a video of a real world example.

--- End quote ---
That proof has been presented many times.

Just look at Nominal's latest diagram.  Use your brain, and imagine one wheel turning.  What does the other wheel do?  Imagine the wheels on two different surfaces, zero slip.  Hold the vehicle steady and move one surface.  How far must the other surface move, and in what direction?  That's all you need.
electrodacus:

--- Quote from: fourfathom on February 08, 2023, 02:31:14 am ---That proof has been presented many times.

Just look at Nominal's latest diagram.  Use your brain, and imagine one wheel turning.  What does the other wheel do?  Imagine the wheels on two different surfaces, zero slip.  Hold the vehicle steady and move one surface.  How far must the other surface move, and in what direction?  That's all you need.

--- End quote ---

I do not need to imagine anything I have the video of the real thing working the way I described.
If you have a video showing something else then feel free to share.

I know you imagine wheel turning as your model is just geometric and not physic. Your mental model does not include Newton's 3'rd law.
So your model will not correspond to reality.
IanB:

--- Quote from: electrodacus on February 08, 2023, 02:40:45 am ---I do not need to imagine anything I have the video of the real thing working the way I described.
If you have a video showing something else then feel free to share.
--- End quote ---

Yes, it's been shared before, here:

https://imgur.com/a/lTqAFg6
Nominal Animal:
Kinematics is physics, even though some call it geometry of motion.  It is the appropriate level of complexity for analysing mechanisms like these.

You do not model forces until you need to consider things like friction and acceleration.  Using only a subset of forces to try and describe a mechanism is an error.  OP's evocation of Newton's laws of motion is a straw man, because A) they are not relevant for the analysis of the mechanism behaviour at this level of complexity (ignoring friction and losses, assuming perfect traction, steady state operation with no acceleration), and B) OP has picked an arbitrary subset of forces that do not describe the system at the level of complexity where those laws would apply, i.e. their "model" does not sufficiently describe the systems at hand.

For an example of an analysis where a complete set of forces would be used, would be to assume the entire system at rest at initial time \$t = 0\$, and then integrate the equations of motion to find out whether the vehicle would accelerate or slip, when some specific (usually constant) force is applied to the paper or blue surface.  Both static and dynamic forces would need to be modeled, both linear and angular, as well as linear and angular momentums.  Again, picking an incomplete subset that happens to support your pet theory isn't physics or science, it is just an error.
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