The Mysterious Stabilization of a Spinning Top

[aaaa202]

Everyone has seen a spinning top in action, and maybe some of you have also seen how they're able to stabilize completely like shown in the attached picture. I do get that they're hard to stop spinning because of conservation of angular momentum, but that they should be able to stabilize just seems weird.

 

[rahon]

No, Left top will get another spin, precession
▽check this out.
http://en.wikipedia.org/wiki/File:Gyroscope_precession.gif

This happen because of conservation of angular momentum.

 

[aaaa202]

I think you misunderstood me. I'm asking how it's able to get back into the position where it stands completely upright after it's been struck and started to preces at angle. I am pretty sure I have seen that happen.

 

[torquil]

My immediate guess is that it might be useful to consider the consequences of the contact point not being a perfect mathematical point, and the resulting interaction between the angular momenta of the top and the surface on which it spins...

 

[PJC01]

I find the stabilization of a spinning top to be a fascinating phenomenon. While it may seem strange or mysterious at first glance, it can actually be explained by the laws of physics.

Firstly, it is important to understand the concept of angular momentum. This is a property of rotating objects that is conserved, meaning it cannot be created or destroyed. When a spinning top is set in motion, it has a certain amount of angular momentum. This momentum wants to remain constant, so as the top slows down due to friction and other forces, it will begin to wobble in an attempt to maintain its angular momentum.

However, the shape of the top plays a crucial role in its stabilization. The top is designed in a way that allows it to act as a gyroscope. This means that the spinning top has a central axis of rotation that is perpendicular to its spinning motion. This axis is also referred to as the top's angular momentum vector. As the top wobbles, this vector remains constant, keeping the top stable.

Additionally, the shape of the top's base is also important. It is usually slightly curved, which allows the top to roll in a circular motion as it spins. This rolling motion helps to distribute the weight of the top evenly, preventing it from falling over.

In summary, the stabilization of a spinning top can be explained by the conservation of angular momentum and the design of the top itself. It is a fascinating example of how physics can be applied to everyday objects.