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Bike that runs in curved surface. Friction between the wheels.
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Bike that runs in curved surface. Friction between the wheels.
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LB7
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Bike that runs in curved surface. Friction between the wheels.
«
on:
11/08/2020 14:53:34 »
here:
begv.png
(53.84 kB . 879x585 - viewed 3447 times)
«
Last Edit: 13/08/2020 11:20:03 by
LB7
»
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Re: Bike that runs in curved surface. Friction between the wheels.
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Reply #1 on:
17/08/2020 17:05:19 »
The sum of energy:
pm.png
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Last Edit: 17/08/2020 17:08:44 by
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Re: Bike that runs in curved surface. Friction between the wheels.
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Reply #2 on:
18/08/2020 06:59:33 »
I corrected the image:
gf9.png
(123.38 kB . 1284x782 - viewed 2349 times)
And I drew another position:
fd9.png
(63.38 kB . 821x767 - viewed 2429 times)
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Last Edit: 18/08/2020 07:20:21 by
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Re: Bike that runs in curved surface. Friction between the wheels.
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Reply #3 on:
18/08/2020 10:00:59 »
Even there is no friction, in that case there is no movement from one red circle to another, so I can push one red circle from the other (or pull) to have the forces F1 and F2.
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Last Edit: 18/08/2020 10:05:43 by
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Ludovic Bavay 19011971 Valenciennes
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Re: Bike that runs in curved surface. Friction between the wheels.
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Reply #4 on:
18/08/2020 10:25:41 »
Not sure what you are trying to prove, but any 3 wheels in mutual contact cannot rotate.
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Re: Bike that runs in curved surface. Friction between the wheels.
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Reply #5 on:
18/08/2020 10:31:47 »
I try to prove the energy is not conserved. The black wheel is fixed (it is the ground). I thought there was friction between the red wheels but not, because there is no movement from one to the other. So in that case, I don't need 4 circles. Just a bike (2 red circles) on a curved ground (black circle) with wheels of the bike big enough to have near the contact between them. Like there is no movement from one wheel from the other, I can push from one wheel the other wheel to have the force F1 and F2 and the sum of energy is -2RFwt.
gf8.png
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Re: Bike that runs in curved surface. Friction between the wheels.
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Reply #6 on:
18/08/2020 12:07:34 »
You have invented the non-working bicycle.
Why did you bother?
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Re: Bike that runs in curved surface. Friction between the wheels.
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Reply #7 on:
18/08/2020 12:24:17 »
In the previous image: there is friction between the red circles, so with friction between the orange circle and the red circle (A) I have less from friction than I lost from the torque around A0:
59.png
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The red circles is the same body: the rear wheel.
hn.png
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Last Edit: 18/08/2020 19:19:31 by
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Re: Bike that runs in curved surface. Friction between the wheels.
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Reply #8 on:
19/08/2020 09:47:46 »
I corrected the image:
ри8.png
(102.26 kB . 1106x789 - viewed 2168 times)
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Re: Bike that runs in curved surface. Friction between the wheels.
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Reply #9 on:
20/08/2020 03:39:31 »
With a basic bike (red circles) on a fixed curved surface (black circle), the friction between the wheels is two times the value I thought so the sum of energy is not conserved:
gf6.png
(83.32 kB . 1162x770 - viewed 2170 times)
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Last Edit: 20/08/2020 03:43:18 by
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Re: Bike that runs in curved surface. Friction between the wheels.
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Reply #10 on:
20/08/2020 12:12:13 »
Energy is conserved.
This is true no matter how many circles you draw.
What are you trying to achieve here?
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