/sci/ - Science & Math » Thread #12400044

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2020

Anonymous Sun 29 Nov 18:22:46 2020 No.12400044 View Reply Original Report

Quoted By: >>12400077 >>12400891 >>12400903 >>12400910 >>12400920 >>12402296

>still no definitive answer for why a bicycle stops falling over only when its moving

Anonymous

Anonymous Sun 29 Nov 2020 18:30:04 No.12400076 Report

Quoted By:

some theorize it has something to do with the tides

Anonymous

Anonymous Sun 29 Nov 2020 18:30:18 No.12400077 Report

Quoted By: >>12400090

>>12400044
Giriscope? The rider does active corrections?

Anonymous

Anonymous Sun 29 Nov 2020 18:32:04 No.12400090 Report

Quoted By:

>>12400077
>Physicist David Jones put theory to the test by building a bicycle with counter-rotating wheels to eliminate the gyroscopic effect and empirically determined the gyro is unnecessary for balance.

Anonymous

Anonymous Sun 29 Nov 2020 18:35:03 No.12400099 Report

Quoted By:

btw, its not the caster effect either
http://ezramagazine.cornell.edu/SUMMER11/ResearchSpotlight.html

Anonymous

Anonymous Sun 29 Nov 2020 22:32:56 No.12400891 Report

Quoted By: >>12402237

>>12400044
because it is too busy going forward to go sideways

Anonymous

Anonymous Sun 29 Nov 2020 22:34:27 No.12400899 Report

Quoted By: >>12400902

centrifugal force.

Anonymous

Anonymous Sun 29 Nov 2020 22:35:30 No.12400902 Report

Quoted By:

>>12400899
retarded.

Anonymous

Anonymous Sun 29 Nov 2020 22:35:33 No.12400903 Report

Quoted By:

>>12400044
COM

Anonymous

Anonymous Sun 29 Nov 2020 22:36:38 No.12400910 Report

Quoted By: >>12401120

>>12400044
Isn't it because falling over also forces the wheel to turn in the direction of the fall altering the path but correcting the balance?

Anonymous

Anonymous Sun 29 Nov 2020 22:39:24 No.12400920 Report

Quoted By: >>12401120

>>12400044
Isn't it just angular momentum of the wheels? The wheels want to naturally rotate around their own axes, and if they get "disturbed" they will want to correct the movement, so if the bicycle tilts the wheels will move it back.

Anonymous

Anonymous Sun 29 Nov 2020 23:31:34 No.12401120 Report

Quoted By:

>>12400910
>>12400920
Must be this. I assume that if you removed the pivot of the front wheels so that the bike was incapable of turning left/right, then it would fall over much much more easily.

Anonymous

Anonymous Mon 30 Nov 2020 05:11:54 No.12402237 Report

Quoted By:

>>12400891
Actually kinda this.

Anonymous

Anonymous Mon 30 Nov 2020 05:28:35 No.12402270 Report

Quoted By:

I dont believe that this should not be well understood.

>bicylcle goes straight
>slight turning of handlebar
>new direction compensates for a falling movement

it just corrects itself.
and when velocity is to slow the rolling speed can no longer compensate and the steering angle becomes too large and the bicycle tips over.

seriously, wtf
Im even sure some simulation would perfectly work.

Anonymous

Anonymous Mon 30 Nov 2020 05:40:26 No.12402296 Report

Quoted By:

>>12400044
Its because the person on top is keeping it balanced. Kind of like why its harder to carry a dead person in your arms vs someone awake and that can modify their center of gravity to accommodate to you.

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