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Old 10-04-2007, 10:50 AM   #21
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Quote:
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Centripedal force. The wheels act as gyroscopes to keep the bike up. It wants to stand up.
Quote:
Originally Posted by Moody View Post
Centrifical force and friction.
I hope you two meant the same thing. Otherwise for someone that knows nothing would be
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Old 10-04-2007, 11:05 AM   #22
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Quote:
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I hope you two meant the same thing. Otherwise for someone that knows nothing would be
Centripetal and centrifugal forces both share the same magnitude, just opposite direction. I believe that centrifugal forces are the reaction to centripetal forces (all forces have an equal and opposite). It's confusing, and been a while since I studied angular momentum, so I'd give both of them .
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Old 10-04-2007, 11:13 AM   #23
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Centripetal and centrifugal forces both share the same magnitude, just opposite direction. I believe that centrifugal forces are the reaction to centripetal forces (all forces have an equal and opposite). It's confusing, and been a while since I studied angular momentum, so I'd give both of them .
Okay, now I am officiallly confused.
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Old 10-04-2007, 11:23 AM   #24
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Well according to Newton, every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it. When travelling in a circle, there must be a constant force pushing that body towards the center of the circle. This force is centripetal (center seeking).

Now Mr. Newton's third law states that every action there is an equal and opposite reaction. For centripetal forces, the reaction is centrifugal (center fleeing) forces. So they have the same magnitude, just opposite directions.

I hope this helps out a bit. Maybe my next lesson will involve examples.
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Old 10-04-2007, 11:27 AM   #25
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Well according to Newton, every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it. When travelling in a circle, there must be a constant force pushing that body towards the center of the circle. This force is centripetal (center seeking).

Now Mr. Newton's third law states that every action there is an equal and opposite reaction. For centripetal forces, the reaction is centrifugal (center fleeing) forces. So they have the same magnitude, just opposite directions.

I hope this helps out a bit. Maybe my next lesson will involve examples.
Give examples it would help. I am a visual person without mental pics, I will be lost.
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Old 10-04-2007, 11:38 AM   #26
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Give examples it would help. I am a visual person without mental pics, I will be lost.
i'll dig up a physics book when I get home, and maybe start another thread on my findings.

heck, maybe I will do some calculations too and do a writeup!

anyhow there's way more involved than just the centripetal and centrifugal forces and the gyroscopic effects of the wheels. There's gravity and friction and many other factors that come into play in why the bike doesn't slide out.

Just think about super-elevated roads vs. non super-elevated roads.
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Old 10-04-2007, 11:41 AM   #27
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i'll dig up a physics book when I get home, and maybe start another thread on my findings.

heck, maybe I will do some calculations too and do a writeup!

anyhow there's way more involved than just the centripetal and centrifugal forces and the gyroscopic effects of the wheels. There's gravity and friction and many other factors that come into play in why the bike doesn't slide out.

Just think about super-elevated roads vs. non super-elevated roads.
Understanding is a key to success.
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Old 10-04-2007, 11:48 AM   #28
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back onto the pictures...

Tony, where'd ya get your name on your suit?
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Old 10-04-2007, 12:10 PM   #29
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Quote:
Originally Posted by hotnanas View Post
Centripetal and centrifugal forces both share the same magnitude, just opposite direction. I believe that centrifugal forces are the reaction to centripetal forces (all forces have an equal and opposite). It's confusing, and been a while since I studied angular momentum, so I'd give both of them .
centrifugal is the opposing force created by the centripetal force (Newton's 3rd law). Also centripetal force is only created when traveling in a curved path (hence taking a curve).

To make it simple, when in a corner, the force trying to make you fall(Centripetal) is equal but opposite to the force keeping you from falling(centrifugal).

It gets MUCH more compicated when you start including the forces of gravity as well. If you draw a real thorough diagram you'll see that more than just 2 forces are pushing/pulling, but in the end all forces acting on an object have an oposing force. The opposing force of gravity is called the normal force, which is basically the oposing force keeping you from flying up or being crushed when you're just standing there.

Ok im off the soap box, time for lunch
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Old 10-04-2007, 12:15 PM   #30
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okay, all you guys confused the living outta me. it's the jedi force that keeps me up, and it does a good job most of the time....


Quote:
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back onto the pictures...

Tony, where'd ya get your name on your suit?
i bought the letters from michael's....and sewed them on myself, but i'm gonna strip them off, cuz i just bought some new patches to sew onto the suit. needle and thread is your best friend if you rely on those sticky patches, they'll fly off sooner or later.
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Old 10-04-2007, 12:17 PM   #31
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okay, all you guys confused the living outta me. it's the jedi force that keeps me up, and it does a good job most of the time....




i bought the letters from michael's....and sewed them on myself, but i'm gonna strip them off, cuz i just bought some new patches to sew onto the suit. needle and thread is your best friend if you rely on those sticky patches, they'll fly off sooner or later.
Tony, What don't you do? You're a Jedi Knight, a painter, a racer, a tatoo artist, and a seamstress?
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Old 10-04-2007, 01:06 PM   #32
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Give examples it would help. I am a visual person without mental pics, I will be lost.
Simply, have you ever had a gyroscope for a toy? Notice how when it's spinning it won't fall over until the speed of the spinning disc reaches a slower speed?

You have two gyroscopes on the bike
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Old 10-04-2007, 01:08 PM   #33
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okay, all you guys confused the living outta me. it's the jedi force that keeps me up, and it does a good job most of the time....

It's simple, don't tuck the front
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Old 10-04-2007, 02:00 PM   #34
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Simply, have you ever had a gyroscope for a toy? Notice how when it's spinning it won't fall over until the speed of the spinning disc reaches a slower speed?

You have two gyroscopes on the bike
Okay, I got the gyroscopic and the centrifugal force. I did some reading about the centripetal and now my head is spinning.
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Old 10-04-2007, 03:25 PM   #35
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And since youre on mini's you would have to factor in reynolds number too right?
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Old 10-04-2007, 03:27 PM   #36
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And since youre on mini's you would have to factor in reynolds number too right?
maybe for the water cooled bikes.

edit: or I guess it would apply with gasses too (flow through pipe). but that has nothing to do with bike stability (i don't think)

Last edited by hotnanas; 10-04-2007 at 03:29 PM.
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Old 10-04-2007, 04:02 PM   #37
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excuse me mister... I just wanna ride!
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Old 10-04-2007, 04:17 PM   #38
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Quote:
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maybe for the water cooled bikes.

edit: or I guess it would apply with gasses too (flow through pipe). but that has nothing to do with bike stability (i don't think)


Aerodynamics of a smaller scale object passing through full scale air.



I was just makin' a joke for the egghaids that wuz showin off their fizzicks knowledge.
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