How Does Precession Keep a Spinning Bicycle Wheel Upright?

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In summary, the conversation is about understanding how a rotating bicycle wheel stays balanced when held on one side of the axle. The concept is explained through the forces of the top and bottom of the wheel wanting to go in opposite directions, but being countered by the wheel's rotation. Further information and resources are also provided.
  • #1
cragar
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I am trying to understand how a rotating bicycle wheel doesn't fall over when you hold it on one side of the axle . I read a thing and it says , the top of the wheel wants to go to the left and the bottom of the wheel want to go right but when the wheel rotates these forces appose because that part of the wheel is now in a new place ,
is this correct , any input will be much appreciated .
http://science.howstuffworks.com/gyroscope2.htm
 
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  • #2
cragar said:
I am trying to understand how a rotating bicycle wheel doesn't fall over when you hold it on one side of the axle .


http://www.cleonis.nl/physics/phys256/gyroscope_physics.php"

Cleonis
http://www.cleonis.nl
 
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  • #3
cragar said:
the top of the wheel wants to go to the left and the bottom of the wheel want to go right but when the wheel rotates these forces appose because that part of the wheel is now in a new place ,
is this correct , any input will be much appreciated .

That is exactly right.
 
  • #4
Thanks for he answers and the videos .
 
  • #5


Precession is a phenomenon that occurs when a spinning object's axis of rotation changes direction due to an external force. In the case of a bicycle wheel, the force of gravity is acting on the wheel, causing it to try and fall over. However, because the wheel is spinning, it also has angular momentum, which creates a gyroscopic effect. This effect causes the wheel to resist changes in its orientation, thus keeping it upright.

When you hold the wheel on one side of the axle, the forces of gravity and angular momentum are in opposition, causing the wheel to remain stable. As the wheel rotates, the forces on different parts of the wheel change, but the overall effect is still the same - the wheel remains upright.

The article you referenced explains this concept well, and yes, the description of the forces opposing each other is correct. Precession is a fundamental principle in physics and is crucial to understanding the stability of rotating objects. I hope this helps clarify the concept for you. Keep exploring and learning about precession and its applications in various fields of science and technology.
 

Related to How Does Precession Keep a Spinning Bicycle Wheel Upright?

1. What is precession?

Precession is the gradual change in the orientation of the rotational axis of a spinning object, such as a top, gyroscope, or planet. It is caused by external forces acting on the object, such as gravity or torque.

2. What causes precession?

Precession is primarily caused by the gravitational pull of other celestial bodies, such as the Moon and the Sun, on the Earth's equatorial bulge. This pull creates a force that causes the rotational axis of the Earth to slowly move in a circular pattern.

3. How does precession affect Earth?

Precession has several effects on Earth, including changing the position of the stars in the night sky over long periods of time and altering the length of the seasons. It also plays a role in the Earth's climate and the stability of its orbit.

4. How is precession measured?

Precession can be measured using various techniques, such as astronomical observations and satellite data. The most common method is through precise measurements of the positions of stars in the sky over long periods of time.

5. Can precession be reversed?

No, precession cannot be reversed. It is a natural phenomenon that will continue to occur as long as external forces act on spinning objects. However, the rate and direction of precession may vary over time due to changes in the Earth's orbit and rotation.

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