# Questions tagged [precession]

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### Does General Relativity predict Mercury's orbital precession without other planets?

From Newtonian mechanics, the precession of Mercury can be calculated by taking into account the gravitational pull of other planets. From that, I assume that in the absence of external planets, ...
• 709
1 vote
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### Does retarded Newtonian gravity predict apsidal precession and gravitational radiation?

This is a question that have troubled me for a while, beginning with the historical fact that the apsidal precession of Mercury as noted by Urbain Le Verrier was one of the motivating issues behind ...
74 views

### How to understand gyroscopes by using vectors?

I’ve seen plenty of videos explaining how gyroscopes work, but almost non of them why they are constrained to work in such way. From seeing only angular momentum vectors, how could one predict ...
1 vote
59 views

### Larmor precession - analogy with gyroscopic precession

Almost everywhere in scientific literature, Larmor precession is introduced via an analogy with a spinning top. I understand that in a quantum framework, precession can be explained considering the ...
170 views

### What happens if we prevent gyroscope to precess?

If we apply some torque to spinning wheel in a vacuumed space in body frame y axis, wheel try to precess due to gyroscopic effect but it will be prevented by obstacles as seen from picture, what will ...
1 vote
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### Can I make a tire swing with no initial angular momentum spin while swinging?

Is it possible to make a tire swing with no initial angular momentum spin while swinging? One way to make it spin while not swinging is to rotate an arm in succession around the three axes; this will ...
• 357
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### Is this an example of precession, or is its motion more complicated?

Let's say there is a solid cylinder floating in space and rotating about its axis of symmetry at rate $\omega$. At time t = 0 a force constant in magnitude is applied to the bottom of the cylinder. ...
• 1,800
16 views

### Experimental liimits on torque free precession of spin?

Inspired by this question, I'd like to know what experimental limits there are on the torque-free precession of particle spin. This is a classical phenomenon, not part of quantum theory, but only ...
• 21.8k
1 vote
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### Is it possible to change the speed at which a wheel is freely spinning by moving only its axle?

Suppose we have a wheel spinning on a perfectly lubricated axle. Is it possible to change its angular velocity about that axle, by moving only the axle? Due to the wheel's symmetry about the axle's ...
• 143
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### Non-swinging Foucault's pendulum

If there is a stationary pendulum, say at the North pole, neglecting torsion, etc. will it seem like spinning around its axis from the reference frame fixed to the Earth's surface. If so, will it ...
69 views

### Will the inner gimbal continue to rotate if no friction?

The picture shows a gyroscope with a rotating disk. Adding a force to the outer gimbal from a certain direction causes the inner gimbal (plus the disk with bearings) to rotate as well. When the force ...
1 vote
273 views

### Resisting Precession of a Gyroscope

its known that if a torque is applied to a spinning gyro, the gyro will pitch. There's a lot physics on the pitch speed, but what is the torque to induce this pitching? ps. I am building a gyro ...
86 views

### Equation to tell if precession will happen?

So I have an seen the equation to calculate precession but it breaks down at when there is not sufficient angular momentum, for example if an object is not spinning we divide by zero and the ...